Apple ipod

Is it Possible to Jailbreak a Iphone 3GS 3.1.3 to 4.0 if it’s Jailbroken thorugh Spirit?

I’m Currently Running Firmware 3.1.3 on a iPhone 3GS that’s been jailbroken with Spirit (With the old Bootrom of course) and i want to update to 4.0 and jailbreak it with Sn0wBreeze V 1.6. But i’m not sure if i can jailbreak it with sn0wBreeze if it’s been jailbroken with Spirit.

You cannot use sn0wbreeze if you used spirit. You cannot currently jailbreak a 3gs running iOS4 if you previously used spirit.

Downgrade 4.0 And 3.1.3 Firmware To 3.1.2 iPhone And iPod Touch JAILBREAK SPIRIT