Play Games Direct From CD

My Friend Can Copy Games So That You Can Just Play Them Straight Off The CD Rather Then Installing Them HOW DO YOU DO THAT???

I Wanna Be Able To Get A Game And Copy It Onto Another CD So I Can Just Insert And Play And Not Have To Install It And IKnow You Can Do It Cause He Does It Every Game And He Wont Show Me For Some Reason SO ANYONE KNOWS PLZ TELL ME

THANX!!!!!!!!!!!!!!!!!!!! :D:D:D