I am running an ICS rom and was wanting to go back to GB. I don't have a nandroid(I know, I know. Would have made things easier), but I haven't done anything to attempt to get back yet. I've been reading and, so far, haven't found anything similar to my issue, but I think I've figured it out. Just checking, as I understand it there are different partitions, which means having to flash something(sorry I'm kinda noob at this) like odin or heidmal. Then flash GB rom? if this isn't right then please let me know, also if there are/is a link describing this already I would be very appreciative for the link to it. You guys are great and thanks for any help I get with my noobness.