hello, i have a 3gs running fw 3.1.3 and i am jaillbroken. i don't know if i used spirit to jailbreak, or not. i am wondering if i can update my iphone to 4.0.1, and use pwnage tool to jailbreak it? i downloaded pwnage tool 4.1 and i downloaded the firmware for iphone 4.0.1. i am wondering when pwnage tool asks me to point to the firmware, would i be able to use the 4.0.1 firmware to restore to. will apple sign this? if i can't update my phone and then jb, will wait for the dev team, but just was wondering if i can update my iphone to 4.0.1 and then re-jailbreak it.