ok i figured it out.
first, import the texture, and name it (Textures\heromountainking.blp)
then, make the model file the normal mountan king, save/close/reopen the map, and re-click the mountan king model and it should apear.
this model kicks ass man, its hammer is worth the space itd take to remove it, this is sweet 6/7 out of 10