Quote: "how can i uv map it??"
It depends on your program. I use blender, not milkshape, so I wouldn't know, but honestly just go on the website or use the online manual for this stuff. That, or you can use another UV mapping program like lithunwrap. Just as a tip, I tried googling to see if Milkshape could unwrap, and the wikipedia article (went to wiki to find the original website for Milkshape) for it said that milkshape was for low poly models. To be honest, and truth be told I'm not exactly sure about Milkshape and what it can fully do, but I'd recommend getting used to another free program such as
truespace or
blender. Again, I'm not sure about truespace, but blender provides all the basics except decent texturing, (i.e. modeling, sculpting high poly meshes, uv mapping, baking texture maps, animating, etc.), and they're both free. But, correct me if I'm wrong, because I'm not entirely sure about milkshape.