I heard that you can do it by going onto Xbox Live and downloading it off of there, or you can just pop the disc in and it will read the CD and basically rip it right off of the CD onto the harddrive. Also, i heard that it is better to use the harddrive with singleplayer or split screen, cuz it's faster, but then it's best to use the CD for online multiplayer, cuz it makes it slower using the harddrive. Is that true. And, last question, can you choose whether you want the Xbox to play the game off of the harddrive or the CD?