Originally posted by Hakon
I'm on a tethered 5.1 JB now, how do I extract them?
Enter Cydia and it the top it will say SHSH: "SHSHs here" and those are the firmwares you can go.

And to use the Cydia blobs to downgrade it will be something like this
You must login or register to view this content. but I think it won't work on iOS5 because that's what I have heard. :confused: