Hi,
I am playing Widescreen Kotor 2 with a combination of 2 mods.
You need Uniws:
https://www.wsgf.org/article/universal-widescreen-uniws-patcher
You need a mod called 16x9 hud (or 16x10 if you prefer), and full instructions in this link:
http://www.gpforums.co.nz/thread/428048/1/
The game works fine, albeit two small details:
1) You can't launch the game in full screen. You have to start it windowed, load your game, than go full screen. Otherwise, it crashes on load.
2) Avoid ALT+TAB or anything throwing to your Windows desktop. Best case scenario, you have to do it once more to regain kb control, worst case scenario the game crashes.
Enjoy!