I would like to second this post, I put the Disable Vertex Buffer Objects=1 into the swkotor2.ini file under the [Graphics Options] and the game now works brilliantly, no more stuttering / crashing on dantooine.
[Graphics Options]
Disable Vertex Buffer Objects=1
Anisotropy=2
Frame Buffer=1
Grass=1
Soft Shadows=1
Shadows=1
Brightness=72
EnableHardwareMouse=1
FullScreen=1
AllowSoftShadows=1
RefreshRate=85
Width=1024
Height=768
V-Sync=0
Texture Quality=2
Anti Aliasing=2
Emitters=1
Thanks to who ever figured this out, as I was about to take the game back to the shop and demand my money back this bug was annoying me so badly.