You might want to have a look at this film, Shooting Beauty for ideas; http://www.everyonedeservesashot.com/
It's about a fashon photographer, Courtney Bent, who worked with a group of Cerebral Palsy patients in Boston to teach them to work with cameras and make photographs. She has since spent time working with brain injury patients at a specialty center here in New Hampshire.

The photographer who made the film is very approachable, and would probably respond to emailed questions for ideas and suggestions, as well.