Hi guys. I managed to update a couple of 2G iphones to 2.1 using Pwnagetool (blessed be) and iTunes 7 on my mac. At some point after that, I installed iTunes 8. A friend accidently updgraded his 2G to 2.1 and asked for some help. I figured that I could install the customised firmware on his as well. So, I put his iPhone into DFU mode, connected it to the mac and proceeded. iTunes saw the iPhone, and began the process. Then it gave me an error 1600! Arrgh! I have tried rebooting the iphone, taking it in and out of DFU, rebooting the computer, all without success. I'm trying to a) figure out why I can't put the custom firmware on this iPhone, b) figure out how to actually get the firmware on the iPhone. Any advice appreciated. Thanks.