Two simple scripts assist in changing Artist and Genre tags of selected MP3 tracks. For example, use the Artist field for "Composer" or "Ensemble" info rather than "Various Artists", and so on.
Designated as a Retro Script because: iTunes' multi-edit function works as well.
OBLIGATORY WARNING! Because this script has been designated as a "Retro Script" there is no guarantee that it will function as described and may even corrupt or destroy data.