Can I keep using the custom .IPSW I created in winpwn multiple times or is it a 1-time deal. Everytime I restore this phone and unlock again I would need to create new one? I am running 2.0 on a 1st gen iphone unlocked and jailbroken on t-mobile. Also can i just do a regular itunes restore if need be? Or is there a special way i need to restore it should something ever go wrong?