I got frazscotland's pack to work!
If u wanna, u can save the texture package to C:/Program Files/LucasArts/Republic Commando/Game Data/Textures. You then open Unrealed, and the click the texture browser. Then you click open (all_purpose_2.utx) or (whatever pack u want), and then it should show the knew textures. Hope that works!! -Slaughter