I am currently have jailbroken iphone 4s 5.0.1. I want to upgrade to 5.1.1 once jailbrake has been release. How can i upgrade with losing all my tweak and customization. I have upgrade once in past but i had to install all the tweak and customization one by one again. is there any way i can backup current image and then restore from that image once i jailbreak to 5.1.1