This script will assist with editing track names using the Unix command-line sed.
Select some tracks, run the script, and enter a sed command (eg: s/ (Bonus Track)// or s/_/ /g). Obviously, your familiarity with sed and regex increases its purposefulness. However, for the sed-phobic, the display always defaults to s/replace_me/with_me/ for simple search-and-replace operations. The adventurous may also find it of use as the basis for other tag-editing scripts.
Simply enter a sed command which will operate on all the selected tracks' name tags.