After my iPod Touch 2G crashed again (stuck with apple logo), I restored it to v3.1.3 then created a custom firmware with Sn0wBreeze (for the larger partition). I then used iREB and tried to restore the custom firmware. Keep getting error 1604. I have previously installed custom firmware but made by someone else for 3.1.2. I've spent most of the day on YouTube and various forums but am at a loss. Any ideas?