Im rooted and used the sholes app back on 2.0.1 but I want to unroot and install 2.1. I have a couple friends who want me to root their phones for them up the process isnt the same as what I used, and I want to practice on mine before I start digging into theirs. Im using the Clockwork recovery v18.104.22.168 Ive tried multiple update.zip files and all of them are giving me this same error. Im in the process of reformatting my sd card and will try again. Hopefully that works. Any ideas?