I am really enjoying using iTunes, however I have one issue. I have some mp3s on my powerbook, and I have some on an external hard drive. Now if I open iTunes and my external hdd isnt plugged in, all the files still show up in the library. This is a problem because I don't know which files are available when the external hdd is not plugged in. Is there a way to tell iTunes to check certain locations for files everytime I open it? So it checks my hdd on the pb and the location on the external hdd and only puts what files are available in the library? Please help me with this as I am getting very frustrated with this aspect of iTunes. Thank you very much everyone!