OO AS2 Architectural Design for FlashMX Drawing APP

I am looking for 2 or 3 competing OO code architectural designs for creating a Flash Drawing app. Although I will accept some other kind of OO design method, my preference is for a Visio UML diagram like the very tentative UML OO Design,which is attached. Also attached is the structure of an inheritance scheme that I found on the web This is the first phase of the much bigger project of implementing the chosen design. The PenPad app available at [login to view URL] Case Study 2 The source files for Case Study 2 (79k) Models most of the currently needed features with the exception of bringing in pictures for masking.