Henri, >I'm thinking to leave my MP3 collecton alone in iTunes 3 for the >immediate future and begin collecting AAC files in iTunes 4. Would >it be easy to have them both operating on the same disk/paritition? >Or does the iTunes4 installation meld with iTunes 3 automatically? It's seamless, and you can have your existing MP3's co-exist with new AAC's, or you can choose to go back and re-encode any existing MP3's into AAC. You can either do this inside iTunes and have it convert from MP3 directly to AAC, but there may be some loss of audio fidelity. Or you can go back to your original CD's and re-encode as AAC with better fidelity. Jeremy -- +-----------------------------------------------------------------+ jeremy at kezer.net http://www.kezer.net/ +-----------------------------------------------------------------+