I have a Mac mini (used as an HTPC) w/ an external HD to hold my music. My girlfriend has a Macbook and I have a Macbook Pro. We both use the external as our iTunes library at home and Simplify Media when we're away from home. What's the easiest way to have all 3 iTunes Libraries (all using the same folder on the external HD for Library) to auto-update when we add music? We have to have separate .lib libraries on our personal Mac's so we can update our iPhones and burn CD's, but those .lib still look at the external HD for the files. I need to be able to add a CD to iTunes from any computer, which the library is shared by all 3. Then go to the other Macs' iTunes and just update the libraries so the new music is showing in their iTunes. Is there a script, program, or setting? All 3 Mac's have the latest iTunes and Snow Leopard.