dynamic new a movieClip with init var
http://www.jonnyreeves.co.uk/2007/05/movieclips-and-object-scope-in-as2/

WORTH to read, many FAQ about as2
http://www.senocular.com/flash/tutorials/faq/#newmovieclip

event receive and dispatch and delegate example
http://flash-creations.com/notes/asclass_eventdispatcher.php

hope example help
http://www.bit-101.com/blog/?page_id=1164

reference will be missed at first explanation
http://stackoverflow.com/questions/896335/referencing-movie-clip-class-instances-immediately-in-actionscript-2

EventDispatcher instantiate methods
http://archive.darronschall.com/weblog/2004/03/the-many-faces-of-eventdispatcher.html

container constructor first -> button constructor
container constructor want to call button stuff, but button hvnt construct
http://www.kirupa.com/forum/showthread.php?241544-AS2-0-Linkage-and-attachMovie-Woe