This might have been answered before but with all the talk about downgrading from 3.1.3 back to 3.1.2 I'm not sure what applies to me and what doesn't. Ok, so I've got my 3.1.2 3GS jailbroken, and I want to remove the jailbreak and restore to 3.1.2. My SHSH is on file with Cydia, I've added the gs.apple.com 74.208.10.249 to my host file, and I have a copy of the firmware on my PC. Can I just shift-click restore in iTunes, navigate to the firmware and let it do it's thing, or do I have to mess around with DFU mode as well?