Hey, thanks for the link. Pretty much confirmed what I thought with my dabble into changing team colors though, it's a pain in the butt XD. Mostly wanted to do that to remove hero glow by replacing the textures so I could mix hero units in with the regular ones more easily.
Now that I've done more than 100 skins the .MPQ thing seems more viable, and learning you can use the other 4 colors could be nifty.