http://smithfox.iteye.com/blog/827743

http://www.permadi.com/blog/2010/10/using-modules-in-flex-action-script-projects/

flex-modular-application-development-using-cairngorm-architecture
http://xebee.xebia.in/2010/10/11/flex-modular-application-development-using-cairngorm-architecture/