Skinning a Model

So which forum does this belong to? noone should know... and i dont wanna spam Sansui's pm box with questions from a noob, so ill ask this...

I have wings 3d

I have lithunwrap (thx sansui)

and I have obj to mdx converter

Q. How do you use lithunwrap?

Whats UV?

How come my model doesnt show when its a mdx and the skin is a .blp? i restarted WE, and i put the path right...