I have a jailbroken ATV2 and would like to update it to Apple TV 2 5.0.2 (iOS 5.1.1). Is it possible to clone my current jailbroken ATV2 as a backup incase I cannot get the new iOS to work with my current software on my ATV2? Basically, is there anyway to go back once I've gone forward? I really want to try airplay from my new Macbook Pro running Mountain Lion and see if it works and how well. If it plays DVD's well enough I might not have a need to jailbreak it again. However, if it doesn't I'll need to go back. Thanks!