I've got a iPhone 2G running iOS 3.1 and I'm selling to to my brother for his first smart phone. I'd like to keep my jailbroken apps (such as SwirlyMMS) so he can use them in the future. So, if I create the ISPW using Sn0wbreeze for 3.3 and update the phone, will it keep the apps, keep the jailbreak, AND keep the unlock?