I have my phone in DFU mode so I choose my custom firmware and I get an error 1600 so now my iPhone (2G) is in DFU mode. I cant get out of it. I tried apples firmware and nothing works now I have a dead phone.
Update 3: If you get Error 1600 from iTunes (or if you see in your log a failure to prepare x12220000_4_Recovery.ipsw), try: mkdir ~/Library/iTunes/Device Support ; if that directory already exists, remove any files in it. Then re-run PwnageTool.