You have patched your game, which is good!
You need to do the Dantooine Lag Fix....
Originally Posted by D333
In swkotor2.ini, go in the "Graphics Options" section and add the line:
"Disable Vertex Buffer Objects=1".
If you are unable to "do" this, in that you cannot "write" to your .ini, you may need to reinstall the game according to the instructions in this post