This script applet stores the tags of the selected iTunes track (as a script property). Later, when you select another track and run the script again, it will paste the stored tags to that track. You are able to choose which tags you want stored.
(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
Copy chosen tag info from one set of tracks to a different set of tracks
Remove iTunes tracks disassociated from files
Copy files of selected tracks to playlist-named folder
Re-associate batch of dead tracks with files from selected folder
Locates pairs of track entries pointing to the same file