In the new Windows Media Player 10, there are expandable lists on the
left hand side for: Album Artist, Contributing Artist, Composer,
Album, Genre, Year Released, etc.  I would like to add "Artist" as an
additional expandable menu and remove "Album Artist".  The reason, I
just want to see "Artists" I don't care about the "Album Artists".

simple, the gray tool bar that displays the artist, name, ect. right
click it, and you can remove or add anything you want.

thanks for trying.  unfortunately, i'm talking about the far left
column that reads from the top down: All Music, All Video, My
Playlists, Now Playing, etc.