http://zh-tw.w3support.net/index.php?db=so&id=141288
http://sujitreddyg.wordpress.com/2008/02/05/splitting-flex-application-into-modules/
Splitting Flex application into modules
http://cookbooks.adobe.com/post_Creating_Application_without_MXML-11123.html
Using Flex 3 Component without MXML – only AS3 (FLEX 3333333333333333333333333!)