I have a few questions: 1. Do you need a hard drive to play assassin's creed? 2. When i first put in my backup copy of assassin's creed, it said i needed an update before i played the game. I hit agree and then it rebooted. Next time message i got was that the disc was dirty. Has anyone been able to play the assassin's creed backup copy on a xbox arcade with no hard drive and a flashed benq drive? 3. Is there a site that lists backup games that have been tested and the systems they have been tested on?