I changed my human female into a fel orc without any missing textures, the fel orc has the spikes on its back, looks pretty awesome imo, but take a look for yourself =)
Screenshot:
http://img245.imageshack.us/img245/5...7012500xh9.jpg
Download:
http://rapidshare.com/files/39956270...tch-5.mpq.html
The axe is the one from BT, its Thunder, the BS mace, but i made it into that axe, the download for that one is here:
http://rapidshare.com/files/39957684...tch-4.mpq.html
As always, just rename the mpq into patch-(3-7)..
For the Character change, remember the Model Fix linked in the sticky.