This script will look for an image file in the parent folder of each selected track's file--presumably its Album folder in which you have previously placed an image file of some sort--and apply the data from that image file as artwork for the track.
OS X 10.6 or later only. iTunes 10.3 or later only. Previous universal version available at the link below in the "Info" section.
Set new Last Played/Last Skipped of selected tracks
Re-associate batch of dead tracks with files from selected folder
Convert selected tracks and replace them with converted versions
Copy selected CD's CD Text to the clipboard
Apply selected CD's CD Text to its disc and track tags
Create a PDF booklet containing info from the selected tracks