Bob Dylan’s Greatest Hits Volume 4 doesn’t exist (yet) so I made a playlist on Rdio that picks up where Volume 3 leaves off, starting with 1991’s Bootleg Series Volume 1.
http://www.rdio.com/people/iandstewart/playlists/8501183/Bob_Dylan%27s_Greatest_Hits_Volume_4/
And about 24 hours later it remains in flux. 🙂