David,

>Decision 1: How to migrate existing forms, business objects into the full MM application.
>2) Redefine my forms as subclasses of the basic MM form, cross my fingers, run it, and try to get things working;

Short of rewriting, I recommend option 2, and redefine them as subclasses of CBizObjForm. After trying this you may find that it's easier to recreate the form...if it's relatively easy, then you win!

>Decision 2: What to do about the project.
>1) Start with a new project. I've made so many tweaks and modifications to MM to get things to work, I feel like my best course of action is to just start a new MM project, and bring in my existing data. I can't imagine what I might have broken during the process, and I have no idea the extent of my changes.

I definitely recommend creating a new project and incorporating your non-MM pieces into it.

Regards,