Reply to iTunes Question - Date CREATED

I'm trying to create some smart playlists - I really want to be able to sort on the date the actual .mp3 file was created.

It looks to me like iTunes can only sort on "Date Modified" or "Date Added". These are terms that iTunes writes to the iTunes library, and are not dates associated with the actual .mp3 file.

Anyone got any ideas? I'm really worried that my music cllection is destined to never be sorted by "Date Created"...