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.)
Remove iTunes tracks disassociated from files
Append user-entered text to beginning or ending of selected tag of each selected track
Applet assists with swapping, copying, appending data between track tags
Enter text for the selected tracks' Description tag
Set choice of various number tags of selected tracks incrementally
Convert or import tracks with any encoder on the fly