This script will change the file type of the selected AAC tracks to "M4B " and file extension to ".m4b", thus making them bookmarkable. (That is, the track will natively resume playing wherever you left off the last time you played it.) Additionally, when used with iTunes 7 or later, deletes and re-adds each track so it will appear in the Audiobooks Library. Ratings, play count, last played date, skip count, and skipped date are preserved.
Perhaps of Interest...
downloaded 8m 29s ago
Rename selected tracks' Song Names with their filenames (minus extension)
downloaded 9m 17s ago
View/Edit tags of selected track(s) in single window
downloaded 11m 21s ago
Delete characters from the beginning or ending of selected tracks' name, artist, album, comments, composer, or show tags
downloaded 17m 28s ago
Play the selected track and stop
downloaded 18m 16s ago
Exports and then re-imports selected tracks' artwork
downloaded 21m 11s ago
Removes leading and trailing space characters from chosen tags in selected tracks