Re: OK, alot of work to keep it weather tight but here is a peice. PICS
In the winter when me and my dad were going to weld a piece in to strengthen the rear by the tailgate, we made a wall thing out of plywood, and used a spare furd rear window on it. So it basically would have looked like a short box if the plywood was painted to match. It didn't keep water out though /forums/images/graemlins/doah.gif
Your idea seems very interesting, make sure to post pics of the process /forums/images/graemlins/waytogo.gif