Change the case of the selected iTunes track names to "sentence case": all lowercase with the initial letter uppercase. For example, "L'effet Que Tu Me Fais" could become "L'effet que tu me fais", and "Comme D'Habitude" becomes "Comme d'habitude". This is customary in many languages.
(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.)
Gather audio tracks whose files contain no artwork metadata
Paste text contents of the clipboard to each of the selected tracks' Lyrics tag
Remove iTunes tracks disassociated from files
Copy Artist to Album Artist of selected tracks
Display, create text file listing info of dead tracks
Sort tracks into playlists by volume location