I think I may have solved alot of ppls probs here I recently Installed SWKOTOR and then proceeded with the update on a Vista Laptop
I was reading on other sites about how to Install the cheat code to the game Most of the sites claimed that you open my computer and then program files and then edit the .ini file with the cheat EnableCheats=1 this is all good and well for the older versions of windows but with vista this is alot harder there is a button on the top of the program files/swkotor folder that is called compatability files once this is pushed the swkotro.ini should be edited with the cheat to have it enable in vista not sure if this also works with XP maby someone could let me know...
Here is a video that I stubled across that shows this
The other problem ppl seemed to have with this game is the .EXE won't let the disk be played because of Securrom properties this can be fixed with this exe supplied by securom just right click and save as... unzip and then replace exe with one in program files, lucas arts, swkotor file
Well I hope this helps people I just wanted to let ppl know as I had troubles with these problems and noticed alot of posts on various forums but to no avail any help good luck and fel free to let me know if this works for you