Alright.This is tough so try to keep up.

1) You have to acess your main drive (EX: Mine is the C: drive)
2)Say yes to any questions.
3)Click progam files.
4)Click on the LucasArts folder
5)Clixk on the SWKotOR Folder.

Now here is the hard part.

6) Click on the notepad with the cog on it and soon it will come up to the place that you want to be.
7)After you modify it should look like this:
[Game Options]
EnableCheats=1
GUIsInScreenShot=1
EnableScreenShot=0
Reverse Mouse Buttons=0
ectect.