Editing The Sword of Arthas?

If I wish to edit the skin of the sword which "Arthas (wielding frostmourne)" has, which skin should I edit?
The sword of the Undead Evil Arthas? In that case, is there a way I can remove the sword from the skin
(like; instead of importing two skins for two units, I could just import another "optional" skin for the sword only)

I've seen this done once before, some place where another skin was in the downloaded pack, and could be imported to replace the original sword of Arthas (like it was croped out of the original UW).

Any answer will be much appreciated or have I simply missed an important detail ? In that case, please notify me about it

Btw, I'm sorry if I'm not explaning myself good enough here.

Textures\FrostmMourne.blp

That's the path for the skin of arthas' (wielding sword) sword.
Textures\FrostMmourne.blp

Doesn't apply because the skin isn't from the Evil Arthas skin.
Also, the size of the frostmmourne skin is only like 7kb with enough compression.
Hardly anything to lose sleep over.

Any skin over the Arthas on foot model's sword is done over the path I posted above.

You're not missing anything, it's just I answered absolutely every question in my last post just by posting the path. :P

Ahh, nevermind I figured it out myself
Appears that what I would have liked you to explain to me, was where to find the FrostmMourne.blp texture

Thanks anyway though :)

Didn't I say in the textures folder? >_>
Well at least you figured it out. :P