this is my first jailbreak, and it's not going so well. i have an iphone 3g. I already upgraded my phone to regular OS 4, then decided to jailbreak it today. I used snowbreeze 1.7 and made a custom ipsw file, put my iphone in DFU mode as instructed, connected to itunes, and tried to restore. It gives me an error, "this iphone could not be restored" the number is 1600. Any idea what's going on? This is pretty urgent because I now have an expensive paperweight sitting on my desk. thanks for any help!