You know what I don't get? TF2 (sorry off topic) and Combat Arms let you mod their skins, why can't we?!!? It's stupid, and annoying. I found like the best mod possibly made and then they patched it!!!!!
As far as I know you were able to mod skins a couple of months ago, but the main method people used is patched. I'm not sure whether there's another way to still mod skins. There probably is but people won't release it as they have the cold fear of it getting patched.