As DiskAid doesn't work when i used blackra1n to JB. The dev team said using Pwnage will solve the problem. "For the early adopters who ran blackra1n and are having problems with mobilesubstrate, winterboard, diskaid, or ifunbox, you can install a custom .ipsw from PwnageTool to fix these issues. Thats because all jailbroken devices accept a custom .ipsw created by PwnageTool." What does it mean when it says install a custom .ipsw? I am creating a ipsw on my own but how do i install it? Do i restore it using itunes or is there other ways?