TweakGuides.com has put up their very own Tweak Guide for Obsidian's Star Wars Knights of the Old Republic: The Sith Lords with tips on essential optimization, troubleshooting, advanced tweaking, and a bunch of other stuff for anyone still interested in (re)playing the RPG. The guide refers to the latest version of Star Wars Knights of the Old Republic 2 Version 2.00.424 (retail) since the patch isn't out yet. Since the original Star Wars Knights of the Old Republic shares the same engine and features as its sequel, most of this guide is applicable to KOTOR 1 as well.

This guide should prove very helpful if you're having any performance issues with the game, and the guide also comments on the game's incomplete endings with details on how to access some of the hidden data, so it's worth a read regardless of whether you have any issues with the game, especially if you're interested.