You can edit and alien's face to look like about anything. Not PS. I've seen those too in game. Or federation orion (like thats hard). It doesnt look exactly like a gorn. More a human with a gorn head.
However, if he wants a really convincing fake, he should learn to demo edit. You could have males with female postures and hairstyles, mix and match Klingon and Romulan costumes, Starfleet Hirogen, etc.