Just purchased 737TNG. Anyone know who I can contact for permission to take the documentation (PDF files) to a copy place to have them printed in duplex style? They are copyrighted but I am sure printing on my own printer would be permitted, but I can't do duplex printing.

I think you should be able to, as long as you dont resell them of course, for your own personal use I dont see why not, you paid for your copy 737NG, but dont quote me on this.