I second MultiMan. I am using the Hermes 4B payload and Multiman loading the game from the internal HD. I would recommend that you delete the game from the manager, and delete the manager itself since this is your first backed up game. Load MultiMan and backup the game to the internal HD. Insert another PS3 game into the drive and launch the game (do not use the direct launch option). Multiman will return you to the XMB and you can then select GoW3 from the game menu on the Disc icon. If this doesn't work let us know.