I have a a 3rd Gen 40GB and an Ibook G4. The Ibook memory was almost full. I needed to create more space so I deleted music that was already on my Ipod. I have added new music to my Ibook now I want to update my Ipod without deleting anything from it. I have disabled the automatic update but I don't know how to transfer the new music to the Ipod. Help, please.