HTC EVO 4G :: Nandroid Backup On Different Phones

I had to get a replacement phone. New phone came with 2.2, so obviously I need to root it. But my question is, can I make a nan backup of my old phone, and once my new phone is rooted restore to my old phones backup?

I have heard that a nandroid backup is saved in seperate folders depending on your phones serial number. I'm not sure how true that is. Someone said that I would have to make a nan backup on the new phone so it creates a seperate folder, and then copy my old backup into the new folder, and restore.