I'm sure there is a simple solution, but my sister has two Ipods and one Itunes. She has already downloaded new songs for one of her kids that just got an Ipod and when she went to sync it she got a msg that this new Ipod isn't recognized. I'm thinking she should not have bought new songs for her newest Ipod and co-mingled them with the existing songs. What is the proper way to use two Ipods with a single Itunes environment? Thanks!!