I suddenly feel the need for a “Rooting for Dummies for Dummies.”

I rooted my Incredible (2.1) back in June, using your previous guide, and it went quite well. However, I’m now getting a prompt about 10 times per day to push 2.2 onto my phone. I would like to remain/return to being rooted when it’s done. I may have missed it… but the only thing I see in your current guide is how to root if you’re already at 2.2. Does being rooted at 2.1 carry over all the configuration (root access, renamed bloatware/adware, etc.) that I’ve done? Or does the 2.2 push (from VZW) wipe everything out and force me to start over?

I got bold this evening and attempted the upgrade… ie, push button to install 2.2, but I soon got a graphic on the screen that was droid standing next to a large yellow bang. When I cycled the phone power, it booted to the green menu that I think comes from the previous rooting process, and it told me there was an error in the signature on the download package. I can’t do anything about the download package… that’s Verizon’s doing. Helllp? Have you got any Rooting for Dummies for Dummies tips?