Ok, I decided to attempt my first reskin. Just something simple, for now. I followed the wonderful tutorials here (
http://www.lucasforums.com/showthread.php?t=149626) (Thanks PrtyLizardJedi!) and extracted the Star Forge Robes (though, for some reason, the inventory icon didn't work; no biggie). After much trial and error with the colors, I got a scheme that I'm happy with for the time being. I saved it up, threw it in my override (just the tga, since I was just recoloring the original) and loaded up my game.
Now, the retexture worked, to a point. I put an orange color in place of the tan/beige color that is there by default, and it looks very yellow out in-game. There is also an odd red 'aura' (for lack of a better word) around the robe in certain places. Might just be that it looks that way outside on Dantooine. I'm not sure.
Anyway, can anyone help with the color change? I'm using Photoshop 6, if that helps at all, and following the steps in the tutorials above.