Airport Extreme + Wired Router [Archive] – The macosxhints Forums http://hintsforums.macworld.com/archive/index.php/t-27965.html
How to properly setup an Airport Express as an access point http://sonos.custhelp.com/cgi-bin/sonos.cfg/php/enduser/std_adp.php?p_faqid=1100&p_created=1276099927