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.
You may prefer the more modern Multi-Item Edit, which can preserve tags temporarily.
(Note: In order to launch this PowerPC-era script on an Intel machine, it must first be opened and then saved using Script Editor (AppleScript Editor pre-OS X 10.0) which is located in your /Applications/Utilities/ folder. More information is here.)
Perhaps Also of Interest...
downloaded 4m 31s ago
Convert selected tracks and export the converted files to a new folder
downloaded 4m 57s ago
Sort purchased tracks into discrete playlists by name or Apple ID
downloaded 18m 12s ago
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
downloaded 20m 16s ago
Applet assists with swapping, copying, appending data between track tags
downloaded 22m 32s ago
Display, create text file listing info of dead tracks
downloaded 22m 34s ago
Title Cap various track tags, featuring editable exceptions lists