Back when the devteam were doing their initial 3G-S research I followed their advice got a full raw USB dump of a restore to 3.0. This presumably will contain my ECID SHSH, but I've no idea how to get it out of the approx 600mb dump file.

Can anyone point me at some info on the format of the signatures, how many there are and where (roughly) they might be in the dump file? I'd really like to get them out and send them over to Saurik so that I can restore to 3.0 rather than just 3.1.

Many thanks..