Ok I'm new here but I'm not that new to iPod/jailbreakin...

Eitherway, my problem is this:

I have an old iPod touch 2g 8gig MB runing IOS4 Jailbroken with redsnow... However I just got a new iPod 2g 8gig MC preloaded with 3.1.3 and I'm giving my old iPod to my brother...

My question/problem is If there is any current way to jb my new iPod (MC 3.1.3) and upgrade to ios 4? Can I use the snowbreeze method allthough I'm on 3.1.3?? I don't mind tethered since I can't even remember the last time I turned off my iPod anyways... Or am I gonna have to choose between 3.1.3 jb or ios 4 non-jb??? Any help is greatly appreciated!!!

-Will_1451