This script will apply user-entered text to the "Category" tag of each of the selected tracks. iTunes 5 or better.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using AppleScript Editor, which is located in your /Applications/Utilities/ folder. More information is here.)
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
Play through each track in a playlist at your set interval
Use special track to stop iTunes, cue next track
Batch-extricate playlists from a selected Folder
Move selected playlists to a new or existing folder
Display, create text file listing info of dead tracks