Here are the steps for adding the PDF ifilter and icon
1. Download Adobe iFilter 6 here:
http://www.adobe.com/support/downloads/detail.jsp?ftpID=2611
2. Install Adobe iFilter on the Indexing Server (SharePoint Server 2007)
3. Add it to the File Type in the SSP
a. In Central Administration click on Application Management
b. Under Office SharePoint Server Shared Services click: Create or configure this farm's shared services
c. Click on the default SSP
d. Under Search click Search settings
e. Under Crawl Settings click File Types
f. Click New File Type and add pdf
4. Add PDF Icon:
a. Switch to the folder that contains the Adobe PDF Filter 6.0 files. For example, switch to the following folder:
Drive:\Program Files\Adobe\PDF IFilter 6.0
b. Type regsvr32.exe pdffilt.dll, and then press ENTER.
c. If you receive a message that the operation was successful, click OK .
d. Copy the .gif file that you want to use for the icon to the following folder on the server:
Drive:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\Template\Images
Icon can be found here (use 17 x 17 one):
http://www.adobe.com/misc/linking.html
e. Edit the Docicon.xml file to include the .pdf extension. To do so:
Start Notepad, and then open the Docicon.xml file.
Drive:\Program Files\Common Files\Microsoft Shared\Web server extensions\12\Template\Xml
f. Add an entry for the .pdf extension. For example, where NameofIconFile is the name of the .gif file:
<Mapping Key="pdf" Value="NameofIconFile.gif"/>
g. On the File menu, click Save, and then quit Notepad."
