I upgraded my 2g to 3.0 using custom firmware with no problem...everything was fine until I tried to install winterboard..then the phone rebooted and showed the apple logo and turned right off and thats all it would do..In itunes it wouldnt restore even in DFU mode..I would get error 1600 or 1601...I kept turning it off and on with same results until I tried going back to the cpu again while trying to enter DFU mode I got the connect to Itunes screen...Finally its letting me restore it but for awhile I was in an endless Apple boot the shut off...I dont know if thats a problem has anyone else installed winterboard on 3.0?