Is there a good way to do this? I have two iPods. One iPod is a 5G iPod. The other is a mini. I want the entire library on the 5G, but just a 4gb worth of the library on the mini. I want to be able to choose which songs they are and still be able to make custom playlists for that iPod that will show up. The mini is more for exercise, so I would like to have 4gb of music plus the ability to sort those 4gb into different playlists, such as music for running, walking, assortments of different artists, etc... Is there a good/available way to do this?