Maybe it's just me, but i'm sure that's been around for a while now?
3GS is the issue with the later baseband.
I hold my hands up and apologise if i'm wrong.....
Your fine lol we just post to give support on this still as a good resource. We gets requests daily still on how to do it on 3g. But yeh on 3Gs is still the big question everybody ask about that. Still waiting on the Dev team but I myself haven't checked up on Dev to see when and if. Last I heard was supposed to be May.
The provided JB instructions on our site were created by us, this solution is our own. We like to share and help others in need.