How to Jailbreak an iPhone 3GS on iOS 4 with Pwnage Tool 4.0

Now that it's legal to jailbreak mobile phones, why not finally take the plunge and jailbreak your iPhone? This video will show you how to create a custom .ipsw for iOS 4 for installation on an iPhone 3GS using Pwnage Tool 4.0. The process is pretty quick and easy, and will allow you to create the custom iPhone interface that you've always wanted.