Since my internal hdd isn't big enough to hold my songs, I've set my iTunes library to an external drive and I've set preferences to copy all imported songs to that iTunes library. But if that external hdd gets filled up and I want to add more songs what can I do? Short of importing all my songs to my iPod and ripping them with Senuti to a newer and bigger drive, could I have err... have 1 long continuous iTunes library spanning across 2 drives?