Im running on Omega Drivers using cat 5.1, game ran decent, lockups usually every 10 minutes on loading screens, so i just saved often. Just landed on dantoonie(dunno if i spelled right =P) anyways i ran to 1fps playing after my first chat, and the screen lags everywhere, making it unplayable, gonna try to uninstall everything and install , gonna remove ati files and install cat 5.2 only, see what happens.
btw , im running amd 3000+ with ati 9700nonpro cracked to pro, had cooling problems but installed a big ass heatsink,cooler on it, 512 pc3200 ram, so its not a hardware issue, this game doesnt use much poiwer anyways
edit 10 minutes later:
Uninstalled ATI Omega Drivers using Cat 5.1
Used Driver Cleaner 3 to clean all files afterwords
Restarted pc
Installed Cat 5.2 directly from ATI site
Restarted PC
Loaded KOTOR2 on same map
Light lag in the beginning now runs smooth, turned graphics way back up, works great
Just install 5.2, everything should be fine
Edit again 2 minutes later: Works fine until u try to do something like look at ur map, once i go back from looking at map it starts lagging again for a few minutes, this is kinda crappy =(