Ok, I installed this to test it out. Here's the article http://www.dailytech.com/Article.aspx?newsid=5341 I added my pdf directory for it to index, ( cache-listener), but since all my pdfs are scans without OCR, it was not able to make any sense of those. Sure it was able to index on the file names. I should probably OCR all of them somehow, and create separate text files for each pdf. Or, create pdfs with searchable text. I then added http://www.synapsedirect.com to the external websites to index, and that is better. So, I can easily, if I were a user, do a search on synapsedirect for help files.
I have Adobe 7 Pro and it could batch OCR entire directories. Problem is .. it changes the dates. Another problem .. it would change the checksum.
I had only 512Mb of ECC ram on my Windows 2003 server, and it is not enough. Omnifind reduced my resources too much .. had to kill it.