FeedDemon bringing spyware?
I don't believe that Paschal's trouble with spyware is caused by FeedDemon. I just scanned with AdAware (David is right, it's great) and came up clean, not to mention the fact that I have had no spyware symptoms.
As for monitoring the registry, try RegMon, or Process Explorer from Sysinternals.
Oh, and thanks to Roy for reminding me about the new Google toolbar. Very nice.