Quote from: "The_Pi"woot found the problem! TGA compression breaks it.RLE Compression - the leading cause of "why does my map crash when I edit a skin?"
It is mentioned a number of times in threads at GT, although to be fair it is not linked to in that specific thread above. It might be worth your (the collective "you" here) while to check out the Battlefront 2 "Everything you need" thread - the games are similar enough that many of the sections will carry over in their entirety (especially the model-related ones).