Putting skins in game without swapping out old ones?

Ive poured through tutorials and tools, yet come up dry...

I made myself a dwarf slayer skin for a warhammer aon im working on (skin posted in the gallery), and need it in the map without swapping out the MK skin I edited to make it. Any help anyone could offer?

You'll need to extract the mdx, then change the skin path.

Basically, instead of - units\human\heromountainking\heromountainking.blp

edit the mdx to say

units\human\heromountainking\heromountainkint.blp

and change your skin to that name.

That's basically what you do. For a more detailed tutorial, check out this site.