I have an iphone 2g (version 2.2) which was cracked... I want to re-format/upgrade it to version 3.0. What is the best and the easiest way to do this? Using what software?tnx

I have an iphone 2g firmware 2.2 how do I upgrade my iphone to firmware 3.0We can jailbreak and unlock iphone 2g firmware 3.0 using Quickpwn? any ideas? tnx