I usually recommend that you should just ignore the files in the iTunes Media folder. There’s not much of a reason to go poking around in there if iTunes is managing your audio files. And interfering could disturb iTunes.
But plenty of iTunes users manage these files manually outside of the iTunes Media folder (although iTunes will still use this folder for Store downloads, CD rips, podcast downloads, and so on, in cases where it needs to know where to save something). For example, users who share their iTunes audio files with DJ’ing software may prefer to access these files manually. So it might be handy to make Album folders more easily identifiable by using the album artwork as the Album folder icon.
Artwork as Album Folder Icon will use the assigned artwork from the selected tracks as the icon for the folder containing each track’s corresponding file in the Finder:
Just select some tracks, or a playlist of tracks, and begin processing with the script. If the tracks have artwork and their files are accessible, the individual album’s artwork will be applied as the icon for the folder containing the files.
More information and download is located on this page.