3.1.2 on 3g can i go to 4.0

[fox98racing]

Hey guys. I have an iphone 3g on 3.1.2 Jailbroken with blackrain. I have shsh files through cydia for 4.0 and 4.0.1. Is there a way for me to restore my iphone to 4.0, and jailbreak again using jailbreakme.com?

[suade8880]

Yes. Get the 4.0-4.0.1 .ipsw firmware ready if you haven't already. Make sure when restoring that iTunes is congfigured to point at Cydia server. For PC, shift + restore manually by clicking that file.

[fox98racing]

I have the firmware downloaded from iphone matrix. Will I have to use tiny umbrella to direct itunes to the cydia server?