How to install the PDF iFilter so that pdf files are searchable (and given an icon too)
Download the latest Adobe PDF IFilter from http://www.adobe.com/support/downloads/detail.jsp?ftpID=2611
Stop the IIS service
Run the Adobe PDF IFilter Setup on your MOSS server
Copy the ICPDF.GIF file (search your server) to "C:Program FilesCommon FilesMicrosoft SharedWeb Server Extensions12TemplateImages"
Open "C:Program FilesCommon FilesMicrosoft SharedWeb server extensions12TemplateXmlDOCICON.XML"
Add the following to the .pdf type:
Add the .pdf file type in the following list:
Open Central Administration, Shared Services Administration (SSP), Search Settings and select File Type
Add the new filetype pdf
Perform a fullcrawl of your content source