OS X 10.8 or later. Copies your single choice of filename, file path (location), file's parent folder path, file creation date (YYYY-MM-DD HH:MM:SS), current playlist, volume adjustment, start time or stop time (HH:MM.SS), artwork size (WxH), purchaser name or purchaser account ID to choice of Category, Comments, Description or Episode ID tag of each selected track. By putting data in one of these available tags it can be visible and sortable or used with Smart Playlist criteria.
I've kept the word "Comments" in the title of this script for legacy purposes, even though modern versions of it can write to other tags.
Choose the information to use (left) and then choose the tag to copy it to.
(via in-app purchase)
Perhaps Also of Interest...
downloaded 29m 59s ago
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
downloaded 33m 21s ago
Applet assists with swapping, copying, appending data between track tags
downloaded 50m 10s ago
Remove iTunes tracks disassociated from files
downloaded 1h 14m 4s ago
Display, create text file listing info of dead tracks
downloaded 1h 24m 39s ago
Restore each selected track's artwork from an image file stored in its Album folder
downloaded 1h 25m 56s ago
Set artwork of selected tracks with a "no cover" graphic