I have an iPhone 3GS, new bootrom, on iOS 4.1 and need to restore my iPhone and re-jailbreak. I don't want to upgrade to iOS 4.2, as there is no jailbreak for iOS 4.2 for iPhone 3GS with the new bootrom (right?). How do I do this? I tried downloading from http://www.iphoneheat.com/2010/09/download-ios-4-1-firmware-for-iphone-and-ipod-touch/ and when I selected it for restore it wouldn't accept it. How do I go about doing this?