I'm having the same problems... I've tried the 5.2 CAT, the Omega Drivers and a couple of others I had on my computer. Because I'm stuck at work, I can't finish what I started last night, which was upgrade to SP2, and try the 4.11 Cat's that I believe were recommended for KoToR when the problems arose in that title.
I can get to the video sequence, and I hear the game sounds for about 5 seconds. Sometimes I even get a cursor on the screen then it dumps me. I've changed sounds to Forced Software, Hardware EAX Disabled, EAX, EAX II, I've changed the refresh rates, resolutions and absolutely everything I can think of in the settings to no avail.
My specs are:
Athlon 2500+
512MB RAM
Radeon 7500 (I know, bottleneck, but still runs every new release to date that I've played)
120GB Hd
I don't understand how the game can launch up, play the first intro movie AFTER creating a character, then spits me out to the desktop. It's ludicrous and I'm already out $50 cause I can't return the game to EB now since it's opened..