I want to upgrade to the stock iOS 4 so I can jailbreak, but I keep getting errors 1601 or 1602. I was spirit'd on 3.1.3 and never got Spirit2Pwn. I have an iPod touch 2G MC model. I think that I might not even ever be able to update my firmware again. I tried removing and reinstalling iTunes and even wiping my device from my settings. Is there any way to restore without iTunes?