Administration of your songs keeps SetPicker up-to-date and gives SetPicker its unique ability to let you pick songs quickly.  You categorize each of your songs in up to 5 different user defined categories.  You then locate any sheet music and/or audio files you have for that song.  After that, when you're writing a set and pick the song, you'll be able to view or print the sheet music, and listen to the audio file.