Alright, I'm debating on which way to approach the mousemap situation on my isometric engine. Since the engine has slopes, there are a total of twenty different tile shapes with each tile shape needing a mousemap. Should I have a massive array to store the mousemap info or should I just call it on the fly from a bitmap? Any suggestions would help.

I would go the calling on the fly from a bitmap route. This is something of a design judgement call though, so it's up to you what you want to implement. ;-)

Kevin