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 52s ago
Create a playlist for each entry of a specified tag
downloaded 1m 10s ago
Gather audio tracks whose files contain no artwork metadata
downloaded 11m 14s ago
Perform search-and-replace on text in your choice of tags
downloaded 14m 28s ago
Perform tasks on a batch of playlists; rename, delete, duplicate, merge, more
downloaded 16m 0s ago
Batch-change the Album Rating for the albums of selected tracks
downloaded 20m 8s ago
Droplet adds files, creates playlists based on folder name(s)