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iTunes: Tagging, moving libraries and playlist folders - Australian Macworld
http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNHbtk1YfdqD5r7h-u8R8RvTohaYHQ&url=http://www.macworld.com.au/help/itunes-tag-move-and-playlists-75409/