Might want to make a couple reflectors with some aluminum foil and cardboard, or buy the ones that you put on your car windshield to keep the sun out. Paint one of them gold, leave one silver. Alternate those under his face and straight natural light. For headshots he can hold it, but an assistant would be good. Look at clothes ads, modelmayhem.com, the fashion/portraiture pools on flickr, etc for ideas. If it's the first time you've shot that stuff, they probably don't expect perfection or artistic genius, but do some fun shots plus the stuff that would probably go in a model portfolio.
BTW, that link needed me to log in, so I couldn't see it. |