SharePoint @ Big Scholar

Here's the code to download files of a certain type (in the example, I set it to find documents in the list with the .doc extension) from a document library to your hard drive.

    SPWeb mySite = SPContext.Current.Web;
    mySite.AllowUnsafeUpdates = true;
    SPList oList = mySite.Lists[<ListName>];
    SPQuery oQuery = new SPQuery();
    oQuery.Query = "<Where><Eq><FieldRef Name='DocIcon'/><Value Type='Computed'>doc</Value></Eq></Where>";
    SPListItemCollection listItems = oList.GetItems(oQuery);

    for (int i = 0; i < listItems.Count; i++) {
            SPListItem item = listItems[i];

            // copy this file to the temp folder
            byte[] binfile = item.File.OpenBinary();

            FileStream fs = new FileStream("C:\\Temp\\" + item["Name"], FileMode.Create);
            BinaryWriter bw = new BinaryWriter(fs);
            bw.Write(binfile);
            bw.Close();
    }

Here's a high overview of how to complete this along with the names of the files required to do this. Most of these files are available from the microsoft site. Just do a google search for the file name and you will be redirected to the download pages. Some files will require licensing (eg. Windows 2003 Server, MOSS and Visual Studio)

1. Install Windows server 2003 64 bit with ISO (SW_CD_Windows_Svr_Std_2003_R2_64-BIT_English_-2_x64_R2_CD1_ISO_MLF_X12-58050.ISO)
2. Install Windows Server 2003 SP2 (WindowsServer2003.WindowsXP-KB914961-SP2-x64-ENU.exe)
3. Install Windows Installer 64bit (WindowsServer2003-KB942288-v4-x64.exe)
4. Install .net Framework 2.0 SP2 64 bit (NetFx20SP2_x64.exe)
5. Install SQL Server Express 64 bit (SQLEXPR_x64_ENU.exe)
6. Install .net 3.5 (dotNetFx35setup.exe)
7. Install SharePoint 64 bit (OfficeServerwithSP1.exe)
8. Install Visual Studio 2008 from CD
9. Upgrade Visual Studio to SP1 (VS90sp1-KB945140-ENU.exe)
10. Install Visual Studio Extensions (VSeWSSv13_AMD64_Build-433.exe)
11. Install PowerShell 64 bit (WindowsServer2003.WindowsXP-KB926139-v2-x64-ENU.exe)
12. Install SQL Server Management Studio Express 64-bit (SQLManagementStudio_x64_ENU.exe)

Optional: Install IE8 (IE8-WindowsServer2003-x64-ENU.exe)

Here's some code that you can copy and paste into XSLT to see the raw xml being passed into the xsl transformation. I got this code from xmlportfolio.com, so please leave the copyrights there if you are planning on using this code:

<!--
Copyright (c) 2001-2004, Evan Lenz
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
    * Neither the name of XMLPortfolio.com nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  <xsl:output omit-xml-declaration="yes"/>

  <xsl:param name="use-empty-syntax" select="true()"/>
  <xsl:param name="exclude-unused-prefixes" select="true()"/>

  <xsl:param name="start-tag-start"     select="'&lt;'"/>
  <xsl:param name="start-tag-end"       select="'>'"/>
  <xsl:param name="empty-tag-end"       select="'/>'"/>
  <xsl:param name="end-tag-start"       select="'&lt;/'"/>
  <xsl:param name="end-tag-end"         select="'>'"/>
  <xsl:param name="space"               select="' '"/>
  <xsl:param name="ns-decl"             select="'xmlns'"/>
  <xsl:param name="colon"               select="':'"/>
  <xsl:param name="equals"              select="'='"/>
  <xsl:param name="attribute-delimiter" select="'&quot;'"/>
  <xsl:param name="comment-start"       select="'&lt;!--'"/>
  <xsl:param name="comment-end"         select="'-->'"/>
  <xsl:param name="pi-start"            select="'&lt;?'"/>
  <xsl:param name="pi-end"              select="'?>'"/>

  <xsl:template name="xml-to-string">
    <xsl:param name="node-set" select="."/>
    <xsl:apply-templates select="$node-set" mode="xml-to-string">
      <xsl:with-param name="depth" select="1"/>
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="/" name="xml-to-string-root-rule">
    <xsl:call-template name="xml-to-string"/>
  </xsl:template>

  <xsl:template match="/" mode="xml-to-string">
    <xsl:param name="depth"/>
    <xsl:apply-templates mode="xml-to-string">
      <xsl:with-param name="depth" select="$depth"/>
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="*" mode="xml-to-string">
    <xsl:param name="depth"/>
    <xsl:variable name="element" select="."/>
    <xsl:value-of select="$start-tag-start"/>
    <xsl:call-template name="element-name">
      <xsl:with-param name="text" select="name()"/>
    </xsl:call-template>
    <xsl:apply-templates select="@*" mode="xml-to-string"/>
    <xsl:for-each select="namespace::*">
      <xsl:call-template name="process-namespace-node">
        <xsl:with-param name="element" select="$element"/>
        <xsl:with-param name="depth" select="$depth"/>
      </xsl:call-template>
    </xsl:for-each>
    <xsl:choose>
      <xsl:when test="node() or not($use-empty-syntax)">
        <xsl:value-of select="$start-tag-end"/>
        <xsl:apply-templates mode="xml-to-string">
          <xsl:with-param name="depth" select="$depth + 1"/>
        </xsl:apply-templates>
        <xsl:value-of select="$end-tag-start"/>
        <xsl:call-template name="element-name">
          <xsl:with-param name="text" select="name()"/>
        </xsl:call-template>
        <xsl:value-of select="$end-tag-end"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$empty-tag-end"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <xsl:template name="process-namespace-node">
    <xsl:param name="element"/>
    <xsl:param name="depth"/>
    <xsl:variable name="declaredAbove">
      <xsl:call-template name="isDeclaredAbove">
        <xsl:with-param name="depth" select="$depth - 1"/>
        <xsl:with-param name="element" select="$element/.."/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:if test="(not($exclude-unused-prefixes) or ($element | $element//@* | $element//*)[namespace-uri()=current()]) and not(string($declaredAbove)) and name()!='xml'">
      <xsl:value-of select="$space"/>
      <xsl:value-of select="$ns-decl"/>
      <xsl:if test="name()">
        <xsl:value-of select="$colon"/>
        <xsl:call-template name="ns-prefix">
          <xsl:with-param name="text" select="name()"/>
        </xsl:call-template>
      </xsl:if>
      <xsl:value-of select="$equals"/>
      <xsl:value-of select="$attribute-delimiter"/>
      <xsl:call-template name="ns-uri">
        <xsl:with-param name="text" select="string(.)"/>
      </xsl:call-template>
      <xsl:value-of select="$attribute-delimiter"/>
    </xsl:if>
  </xsl:template>

  <xsl:template name="isDeclaredAbove">
    <xsl:param name="element"/>
    <xsl:param name="depth"/>
    <xsl:if test="$depth > 0">
      <xsl:choose>
        <xsl:when test="$element/namespace::*[name(.)=name(current()) and .=current()]">1</xsl:when>
        <xsl:when test="$element/namespace::*[name(.)=name(current())]"/>
        <xsl:otherwise>
          <xsl:call-template name="isDeclaredAbove">
            <xsl:with-param name="depth" select="$depth - 1"/>
            <xsl:with-param name="element" select="$element/.."/>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:if>
  </xsl:template>

  <xsl:template match="@*" mode="xml-to-string">
    <xsl:value-of select="$space"/>
    <xsl:call-template name="attribute-name">
      <xsl:with-param name="text" select="name()"/>
    </xsl:call-template>
    <xsl:value-of select="$equals"/>
    <xsl:value-of select="$attribute-delimiter"/>
    <xsl:call-template name="attribute-value">
      <xsl:with-param name="text" select="string(.)"/>
    </xsl:call-template>
    <xsl:value-of select="$attribute-delimiter"/>
  </xsl:template>

  <xsl:template match="comment()" mode="xml-to-string">
    <xsl:value-of select="$comment-start"/>
    <xsl:call-template name="comment-text">
      <xsl:with-param name="text" select="string(.)"/>
    </xsl:call-template>
    <xsl:value-of select="$comment-end"/>
  </xsl:template>

  <xsl:template match="processing-instruction()" mode="xml-to-string">
    <xsl:value-of select="$pi-start"/>
    <xsl:call-template name="pi-target">
      <xsl:with-param name="text" select="name()"/>
    </xsl:call-template>
    <xsl:value-of select="$space"/>
    <xsl:call-template name="pi-text">
      <xsl:with-param name="text" select="string(.)"/>
    </xsl:call-template>
    <xsl:value-of select="$pi-end"/>
  </xsl:template>

  <xsl:template match="text()" mode="xml-to-string">
    <xsl:call-template name="text-content">
      <xsl:with-param name="text" select="string(.)"/>
    </xsl:call-template>
  </xsl:template>

  <xsl:template name="element-name">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="attribute-name">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="attribute-value">
    <xsl:param name="text"/>
    <xsl:variable name="escaped-markup">
      <xsl:call-template name="escape-markup-characters">
        <xsl:with-param name="text" select="$text"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:choose>
      <xsl:when test="$attribute-delimiter = &quot;'&quot;">
        <xsl:call-template name="replace-string">
          <xsl:with-param name="text" select="$escaped-markup"/>
          <xsl:with-param name="replace" select="&quot;'&quot;"/>
          <xsl:with-param name="with" select="'&amp;apos;'"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:when test="$attribute-delimiter = '&quot;'">
        <xsl:call-template name="replace-string">
          <xsl:with-param name="text" select="$escaped-markup"/>
          <xsl:with-param name="replace" select="'&quot;'"/>
          <xsl:with-param name="with" select="'&amp;quot;'"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="replace-string">
          <xsl:with-param name="text" select="$escaped-markup"/>
          <xsl:with-param name="replace" select="$attribute-delimiter"/>
          <xsl:with-param name="with" select="''"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <xsl:template name="ns-prefix">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="ns-uri">
    <xsl:param name="text"/>
    <xsl:call-template name="attribute-value">
      <xsl:with-param name="text" select="$text"/>
    </xsl:call-template>
  </xsl:template>

  <xsl:template name="text-content">
    <xsl:param name="text"/>
    <xsl:call-template name="escape-markup-characters">
      <xsl:with-param name="text" select="$text"/>
    </xsl:call-template>
  </xsl:template>

  <xsl:template name="pi-target">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="pi-text">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="comment-text">
    <xsl:param name="text"/>
    <xsl:value-of select="$text"/>
  </xsl:template>

  <xsl:template name="escape-markup-characters">
    <xsl:param name="text"/>
    <xsl:variable name="ampEscaped">
      <xsl:call-template name="replace-string">
        <xsl:with-param name="text" select="$text"/>
        <xsl:with-param name="replace" select="'&amp;'"/>
        <xsl:with-param name="with" select="'&amp;amp;'"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:variable name="ltEscaped">
      <xsl:call-template name="replace-string">
        <xsl:with-param name="text" select="$ampEscaped"/>
        <xsl:with-param name="replace" select="'&lt;'"/>
        <xsl:with-param name="with" select="'&amp;lt;'"/>
      </xsl:call-template>
    </xsl:variable>
    <xsl:call-template name="replace-string">
      <xsl:with-param name="text" select="$ltEscaped"/>
      <xsl:with-param name="replace" select="']]>'"/>
      <xsl:with-param name="with" select="']]&amp;gt;'"/>
    </xsl:call-template>
  </xsl:template>

  <xsl:template name="replace-string">
    <xsl:param name="text"/>
    <xsl:param name="replace"/>
    <xsl:param name="with"/>
    <xsl:variable name="stringText" select="string($text)"/>
    <xsl:choose>
      <xsl:when test="contains($stringText,$replace)">
        <xsl:value-of select="substring-before($stringText,$replace)"/>
        <xsl:value-of select="$with"/>
        <xsl:call-template name="replace-string">
          <xsl:with-param name="text" select="substring-after($stringText,$replace)"/>
          <xsl:with-param name="replace" select="$replace"/>
          <xsl:with-param name="with" select="$with"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$stringText"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

</xsl:stylesheet>

Here's how you can add custom properties into the people search results.

Firstly, search for a user. Anyone will do.

Then click on Site Actions > Edit Page

Edit the People Search Core Results web part

Under the heading "Results Query Options", click the ... next to the Selected Columns and add the column:

    <Column Name="CustomPropertyName"/>

Now click on the XSL Editor... button

Look for the section: <div class="psrch-Description">

Enter this in that section:

    <xsl:with-param name="CustomPropName" select="CustomPropertyName" />

Now look for this: <xsl:template name="DisplayOfficeProfile">

Enter this in that section:

  <xsl:param name="CustomPropName" />

and:

  <xsl:if test='string-length($CustomPropName) &gt; 0'>  
   <xsl:value-of select="$CustomPropName" /> 
   -
  </xsl:if>

Now, when you click on OK, you'll get an error in the web part. Ignore that error and try to do another search to see the custom property appear in the results.