Thanks for the advice, but I actually HAD to. I thought I bricked my phone. It was 4 days of non stop work. But I'm up and running now. But yes, you are correct, if the 1.5.1 does not work then the 1.4 will just do not up grade.
I wanted to do an update to the posting for Pandora 1.5.1 and the Droid 2. There was an update that was happening recently for it. I had mine set for the auto update. Bad idea. After the update Pandora did not work. I uninstalled the app, then reinstalled 1.5.1 and made sure the auto update was NOT checked. The app is now working. Thought this might be helpful for someone.