1. Run Redsn0w, and direct it to your current ipsw - like how previous ones are done. =P
2. Click on Install Cydia as shown below:
3. Make sure your iPad is OFF and PLUGGED IN to the computer before you hit next.
4. After hitting next, the guide will walk you through putting your device in DFU mode. Follow the onscreen instructions exactly. It is those press and hold instructions... =)
5. Sit back and wait for now. You will get the following message:
So that is how to perform an iPad 2 jailbreak with iOS 4.3 using RedsnOw.