Hi, I have an iPhone 3GS with 4.0 that I'd like to be able to downgrade and then use sn0wbreeze 1.6.1 to get a jailbroken OS4. I have jailbroken this phone back when it was running 3.1.3 with Spirit and I used Cydia. I never chose to save my SHSH files, but I read on some threads that just running Cydia would make it automatically save them. Is this true? If it makes any difference, I jailbroke with Spirit around the middle of June 2010.