3 year old male is not too much to handle. Does he let ur friend pick him up? Anyways, a common method is to pick it up with a large towel, or if he's very bezerk place the towel on top of him and then pick him up. He will lash and try to scratch.
Some reptiles are calmer when "cool", so moving him early in the morning when he hasn't heated up to full capacity.
Try to keep the stress to a minimun. Other methods are luring him in a LARGE plastic container (with holes for air), like one of those large Rubbermaid.
Now...do u have already a LARGE enclosure for him? At that age he needs an adult sized one (minimun 6x6x4). Also, what is his current health condition? If ur friend doesnt know much about them, chances are something might be wrong (MBD? Endorparasites, etc...).
Once in his new cage let him get adjusted for a couple of days. The only interaction should be feeding, cleaning and watering.
Visit Melissa Kaplan's website for more info and tips.
Good luck!
-IJ