Create different textures variation

[ScarabMonkey]

I've now made a tutorial opn how to use TextureSets.

http://forums.nexusmods.com/index.php?/topic/566777-tutorial-new-texture-for-existing-model

 

It really is better to do it that way, even if only because an update to Skyrim may fix something broken about a nif file, which you have then copied.