I've rooted once on 2.1 to obtain tethering. I followed some instructions to get this to work. NOW I would like to go to 2.2, and re-root, to be able to do my tethering without taking a $ hit. I received the OTA and quickly found out that it failed due to my previous rooting, so it was unsuccessful. What would be the steps I need to take? I'll pull my pics, and music off, other than writing down my account setting I'm fine with wiping it clean.