I have an .ipsw file that I've downloaded off the internet, and used that with PwnageTool to create a custom .ipsw file on my iMac OS X. So does this mean that when I plug my iPhone 3G (already jailbroken and unlocked, I am running 2.2 with baseband 02.28.00), click (option+restore) and choose the custom .ipsw file, it will restore to that file, and keep my baseband at 02.28.00? I'm just sketchy on doing this because I don't know if the baseband will go up and from what everybody is saying, 5.11.07 is unlockable. And since my phone is already jailbroken and unlocked (carrier is T-mobile), Dev team says I do not have to enter DFU mode, so all I would have to do is restore and afterwards just ultrasn0w the link for the unlock? btw, 1st time trying to jailbreak by myself, so I'd really appreciate any help. p.s.: what's the deal with the 16xx errors that come with these? I've read about some but I don't know exactly what they are and what iReb is and how it coincides with it. Thanks!