I am in the same process. Slow process for me. In addition to researching here on Audiogon, there is a ong thread on Sonos forums related to your issue.
http://forums.sonos.com/showthread.php?t=18305
Not sure if links are allowed. Sorry if not.
http://forums.sonos.com/showthread.php?t=18305
Not sure if links are allowed. Sorry if not.