Let's say the itunes library location is at: /Users/[user name]/Music/iTunes/iTunes Media and I add to library from an external hard drive where I keep my "master collection". I know that the songs will get copied from external master location to iTunes media library location and than uploaded. However what happens when I add new songs to the "master collection"? Would I have to remember to manually add them to iTunes every friggen time? Apple doesn't seem to care about these type of users who have mixed music collections.