Redsn0w 0.9.6B1 Windows Jailbreak IOS 4.1

The iPhone Dev Team has released their tool to jailbreak iOS 4.1 on Windows. iPhone Dev Team has previously released redsn0w 0.9.6b1 for Mac OS X and now, it’s out for Windows PC.
IF YOU USE THE ULTRASN0W UNLOCK, PLEASE WAIT FOR PWNAGETOOL TO SUPPORT 4.1. DO NOT USE REDSN0W. That’s because to use redsn0w at 4.1, you need to already have updated to official 4.1 from Apple. If you do that, you lose the ultrasn0w unlock (possibly forever).

Note: if you have an “MC” model of the ipt2g, your 4.1 jailbreak will be tethered…sorry! (Consider rolling back to a FW supported by jailbreakme.com or spiritjb.com)

Beta release supports:

iPhone 3G and iPod touch 2G only (for now)
Mac OS X x86 and Windows only (for now)
4.1 or 4.0 firmware from Apple
How to use Redsn0w:
If you’ve already updated your device to 4.1 or 4.0, the next steps are:

Launch the beta redsn0w 0.9.6b1
Select your stock 4.1 or 4.0 ipsw (you’ve already used this to update your device to 4.1 or 4.0)
Select “Install Cydia” and any of the other options shown above, then click “Next”. Use DFU mode to install the jailbreak.
Note: If you choose to “Enable battery percentage”, you actually toggle that off and on via Settings->General->Usage.