I should point out I've tried numerous times- selecting all the faces I wanted inside that window, selecting just the vertices, etc etc... to no avail!

By the way-- how come there's no square, outer border where the skin would presumably start and end? why is there no way to resize the skin in there? I am starting to miss the old MED sorry if this bothers anyone but I'm a complete n00b when it comes to anything but level design (this is my first foray into building a level completely out of terrain + models)

Once again thanks for any help on this one. I look forward to when I'm experienced enough to help other n00bs with their senseless questions