I remember reading something about it a while back. It was completely new footage captured just for that game. It was Dave Prowse in the suit, but I don't know if it was JEJ. I got confused before thinking of the energizer bunny commercial in which they again filmed all new footage and had someone (not Dave Prowse) in the Darth Vader suit. I think I read about it in an old Star Wars Insider magazine. It would be great if someone could capture that from the tape.