I bought a iPod Touch 1G from my friend and it was on 3.1.2. After several restores to this firmware, I have noticed that the system lag (even without the jailbreak) is horrible. I want to put it back on 2.0. How can this be done in one shot? I have tried multiple times, but keep on getting the dreaded "16xx" errors. Is it possible to do this? Also, what version of iTunes do I need? Thanks in advance.