I have a Droid running 2.2.3. I can't remember if it's a special build or not. It's been a "backup" device for a couple years now (activated for a few bucks a month on pageplus) and, with a loaded microSD, it's supposed to be a music player. But it's such a dog with the UI that I rarely touch it. I'm curious if there is a ROM I can put on it that will run smoothly as a music-only player (and maybe a calculator from time to time)?