One last question thoguh, will Opengl work along side the builtin 2d? Will opengl work with the GUI?
That's two last questions. =]
1. Yes, but there are pitfalls/things to watch out for. It is easy to mess up the order of the inner workings of Max2D and start getting strange results.
2. Yes. You create a Canvas, just like in B+, then attach a graphics renderer to it, such as the DX or OGL Max2D modes. Then you target draw operations on the canvas and the rest is exactly the same. If you use things like menus, drop down boxes and scrollers, you may need to learn the new Hooks interface to get the best out of canvasses.