Change when you save the file that Pilot posted, change the extension to .wcz then Winamp will be able to recognize it.
I love the skin that Oddbodd linked to... it was actually done by a member of the old forums... George T Gimp. And you're right... it is hard to find... I had to ask George himself where to get it from!
I also found
this one when I was browsing FTP sites once.
I always have my Winamp set to random skins with my Oddworld ones and a couple of Sephiroth ones.
Abe Babe...