iH8sn0w, who describes himself as a Jailbreak Dev / CustomFW Bundle Maker has released Sn0wbreeze 2.2 for Windows. sn0wbreeze is a tool for Windows® that will jailbreak your iPods, iPads, iPhones!
With Sn0wbreeze 2.2 windows users who want to jailbreak and also unlock their iPhones (iPhone 4, iPhone 3GS, iPhone 3G, Verizon iPhone 4) to update their iPhone with a pre-jailbroken iOS 4.2.1 firmware while preserving the baseband from getting upgraded. Preserving baseband helps unlocke idevices using Ultrasn0w using the “Baseband Preservation Mode”..
iPhone Dev Team have already released PwnageTool 4.2 for Mac. With Sn0wbreeze 2.2 windows users too can accomplish what those MAC OS X users are doing with PwnageTool 4.2.
With Sn0wbreeze 2.2 users are able to create a pre-jailbroken custom iOS 4.2.1 firmware file to upgrade / update their iPhone, iPad or iPod Touch to iOS 4.2.1. In case of iPhone
From Sn0wbreeze 2.2 iH8sn0w website;
Setup custom boot logos, activate your iPhone, set a root partition size, build custom firmware, install SSH, and more!
iPhone 3G[S] (old bootrom & new bootrom)
iPod Touch 2G (MB & MC)
iPod Touch 3G
iPod Touch 4