P.s. The only other thing That I think you could do that would ad to its believeability, (if thats a real word) would be to bevel the hard edges on the frame and stuff. Not alot, just enough to make the edge not so hard. I try to bevel just about everything, that way you get a nice soft edge, and then you can smooth it for your final render, and it will still keep the edges. Just a sugestion,
Brian