I am posting this for my own future reference :-p and other newbies like me :-).
I downloaded the Adobe Pdf iFilter from here. And then followed the instructions.
But I got error (below)
Crawled (The filtering process could not process this item.This might be because you do not have the latest file filter for this type of item. Install the corresponding filter and retry your crawl. )
So when I googled around, I was pointed to many forums and blogs on how to overcome the error. I find this article very informative especially when it mentioned about checking the second registry key.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\12.0\Search\Setup\ContentIndexCommon\Filters\Extension\.pdf]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\Search\Setup\ContentIndexCommon\Filters\Extension\.pdf]
But after I made the changes, I was still getting the error. After troubleshooting for a while. I found out that I made a silly mistake !! I forgot about the curly brackets. I changed the registry values for the two keys above to {E8978DA6-047F-4E3D-9C78-CDBE46041603} and it works perfectly now.
