This site has some good information:

http://webpages.charter.net/rcfu/HelpsHints/ModDgn.html

Compufoil works pretty good for airfoils and wing plans:

http://www.compufoil.com/index.shtml

I would have him take a look at some of the stik planes. They are very simple and easy to construct. Something with that basic sort of design shouldn't be too hard to make work.