Yo, Me and All,
(I hate replying to myself!)
I haven't posted for a while because I've actually been playing the game! Turns out that, for me, the Catalyst 5.2's did the trick. I installed those Thursday night and everything's been smooth sailing since. (w00t) I played for five hours last night straight with no issues. I had a few graphical artifacts (textures being replaced with matte black depending on the viewing angle) at Peragus, but after quitting for the night and starting the next day, they seem to have gone away.
So, my experience:
Cat 5.1 - sucky, constant crashes
Cat 5.2 - smooth sailing
To remind, I've got a GigaByte Radeon 128MB 9600XT, P4 3.2E, Intel D865PERL, 1 gig DDR2700. I'm runnig 4xAA and 4xAnisotropic.
Good luck everyone!
---Jason
P.S. - I tried installing the Cat control center, but what a dog! If that's how fast .NET apps run, no thanks!