I read the instruction manual front to back and found nothing on details of installing/playing a game and how this works.
I 'assumed' that if the game is "installed" on the hard drive, it should be playable from the game library. So after loading 8 games onto my harddrive to take to a party, when we tried to play them it said, "please insert game disk". I did not bring any game disks, because all the games were "installed". If the disk is needed anyway, why do we bother eating up hard drive space for games? What is the purpose of the "install game" option, if it won't play without a disk?