wow, thanks for all the helpful suggestions...

I chewed up the head of the screw, so the threading is still intact. I was able to loosen it with a pair of vice grips and now I'm inside debugging my empeg. Everything is seated properly which is good, but it looks like I lost my primary 20GB drive. So I can finally justify buying a new 60GB drive!

Once again, thanks for the suggestions.

--Ajay