Maya for Ultra

I have some questions about what daan says in another topic. I have downloaded maya, and i have learned the very basics of it. I found it a fantastic programm, and i wonder how can i use it with serious magic ultra. I have created a simple scene. How can i make it recognisable by ultra as a virtual set (.mfx format ?). And secondly how can i set where the video is going to be placed (that grey thing with the question-mark)?