Help with iPhone cracking

Hi, I’ve got an iphone 3G with 3.0 OS that’s cracked but I would like to upgrade to 3.1 or 3.1.2 (cracked)
Anybody got info on how to do this?
Help is appreciated
Answer #1
http://blog.iphone-dev.org/post/211802082/pwnage-pie
That’s all the information you need on updating cracked firmware. Just don’t touch iTunes.
Answer #2
Check Nexus’s thread for iPhone jailbreaking and hacking

http://www.google.com?t=2802051
Answer #3
Thanks a lot guys!
Answer #4
Moved from Off-Topic to Helpdesk.