"Green River" is an excellent choice for a tutorial! I would love to teach it but there is an approval process involved so we can't promise to fulfill all requests. Here is some more info on the song lesson process, and this is the "official" place for song requests:
http://www.guitartricks.com/forum/forumdisplay.php?f=58Thanks for enjoying my tutorials, and keep rocking!
Mike
Keep rockin!
Mike Olekshy
GT Guitar Coach