This applet will assist with swapping, copying, and appending data between two user-chosen tags in selected tracks or tracks in the selected playlist:
Swap - swap data between tags, ex: ARTIST<->COMPOSER
Copy - copy data from one to another tag, ex: ARTIST->
Append - append data from one tag to the end of another, ex: ARTIST->COMPOSER - ARTIST
Prepend - prepend data from one tag to the beginning of another, ex: ARTIST->ARTIST - COMPOSER
The latter three actions also provide an option to delete the info from the first tag after the copy. Read Me explains all.
For OS X 10.6 or later only. Previous universal version comprised of four separate scripts is available via direct download in the "Info" section below.
Select the Action to perform between the two chosen tags in each selected track.
App displays files in iTunes Media folder which are not in iTunes library
Convert selected tracks and export the converted files to a new folder
Remove iTunes tracks disassociated from files
Display, create text file listing info of dead tracks
Convert selected tracks, export new files to Artist/Album folders
Sort purchased tracks into discrete playlists by name or account ID