I want to play against my father online. He has a laptop he uses when he travels for business. My Chessmaster game is installed on his laptop. He wants to buy the game so he can play me. My question is; Does he have to uninstall the Chessmaster I installed, and install his. Or can he just use the disc from his new game. I know the cd key will be different, Can you change that without reinstalling? or is it easier to reinstall? I want the simpleist soultion, hes not the greatest on computers and hes way up north, so I'll have to guide him over the phone.