Solutions So Far: 1600 Error: Put device into restore mode & NOT DFU mode when shift-installing custom firmware. 1604 Error: You cannot fix this with mac, get Bootcamp/Virtual Machine running and move your 3.1 custom firmware created with Pwnagetool to that OS. Then DFU restore to 3.0 in Windows using iTunes. Once at 3.0, Jailbreak with RedSn0w 0.8. Once jailbroken, Go into Restore mode on your iPod and Shift-Restore to the Custom Firmware you created on mac. Once done, go back to mac and re-sync your data. And your jailbroken! ____________________________ Ok this is annoying me. I keep trying but I get another error. The 1600 error is because you have to be in recovery mode, not dfu. to get into recovery mode, hold down power and home until the ipod reboots and you see the apple logo. Let go of the power button, but keep holding down home until you see the "connect to itunes screen. But after fixing that, You might get a 1604 error, like me. A user on a different forum suggest that you should just option-restore to the custom firmware without going into any modes. I have not tested this and do not know if it works. Does not work, Gives Recovery mode. 1604 Solved, go to the top of this post. Discuss.