As of version 4, iTunes has a "Replace Existing" option when users are re-importing CD tracks to replace existing tracks. The problem is that iTunes will only allow this option if the ID3 info for the CD tracks and the current iTunes tracks is identical. This script writes the writable info from selected tracks to the info of a CD; when you re-rip, the CD track data is already the way you want it.
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Perform search-and-replace on text in your choice of tags
downloaded 8m 34s ago
Display and export playlists' name, size, time, and track count for selected source
downloaded 8m 52s ago
Convert selected tracks and export the converted files to a new folder
downloaded 9m 7s ago
Rename selected tracks' Song Names with their filenames (minus extension)
downloaded 9m 41s ago
Gather audio tracks whose files contain no artwork metadata
downloaded 15m 52s ago
Set year of selected tracks to their release date's year (if available)