Hi, this is my first post but i think i've discovered how to mod this game.
Well, at least the PC version of the game, looks moddable.
Go to LevelPacks folder (in tfu2 main folder) and right click on any of the pak files inside, then open with, and select WinRar.
Also, while looking throug the game files, i've found some files about an
Endor DLC level, that seems pretty interesting...