Thank you!

Unfortunately I made a mistake and I was hoping you could help.
I fully rooted my phone, but I was having trouble with installing Kernels and ROMS so I decided to un-root. I apparently un-rooted incorrectly by following these steps: http://www.youtube.com/watch?v=azwdpK400JA

Currently I do not have a rooted phone and running 2.1-update 1. Problem is my phone is still set to S-OFF. I tired to re-root my phone with Unrevoked but I get an error towards the end stating: “Internal Error: am reported error starting service”

Is there a way to re-root my phone or a way to install 2.2?

I am sorry for the trouble. If you are unable or wish not to deal with my problem, I understand and would like to say Thank you again for your guide!

-Noob