I was jail breaking a brand new 3G[S] (fw 3.1.2) with redsnow. while in the process the phone went dead. it is in dfu mode and i tried restoring with custom 3.1.3 fw but getting errors 1601 & 1600.

iTunes is not letting me restore to 3.1.2 or custom 3.1.3. I need to retain the baseband for unlock. anyone has any suggestions?