I used a friend's MAC to download the 9.2 beta and firmware and stuff and brought it back to my house where I own a PC. I plugged it up and it said the iphone is only compatible with iTunes 9.2. I've been using this for about a week now but now want to go back to iphone OS 3.1.3 because I can't put any musi con here or out my backup on here with my contacts, etc. Is there anyway I can restore my phone on my PC back to 3.1.3 considering it says my phone can't be used due to the iTunes 9.2 thing? I have an iPhone 3G if that matters and also I wanted to know if there's an iTunes 9.2 for windows yet because that would make this much easier.