I am currently jailbroken with GP(4.1) and I believe that my SHSH Blobs are saved as there is an "SHSH: 4.1, ... " on the top of my Cydia. Am I safe to upgrade to 4.2? I realize that GP is not yet available for 4.2 but Id rather upgrade my OS and wait for it to come out. Haven't done this before so I am a bit skeptical. Where can I find the process instructions to upgrading my OS whilst jailbroken? Thank you