OS X 10.8 or later. Append the same user-entered text to the beginning or ending of the existing text in the chosen tag (Song Name, Artist, Album Artist, Album, Composer, Comments, Genre, Grouping or Show Name, and their Sort siblings) in each selected track.
For tags other than "Song Name" and "Show Name", this script may be just slightly less involved than performing a multi-edit on the selected tracks.
Also see This Tag, That Tag.
Preview each track as it will appear after applying the entered text.
Displays file path and file name of current track
Export selected playlists as individual XML or M3U files
Set the Plays of selected tracks.
Displays files in iTunes Media folder not in iTunes track library
Set artwork of selected tracks with a "no cover" graphic
Append user-entered text to beginning or ending of selected tag of each selected track