Background Image/Quadview with Python

Hi,
does anyone know if it’s possible to access the backgroundimages through blenderpython in (2.5)?

Finding the images in the object class is not the problem, but I want to know the size of the bg image in blender units and its offset. And even more important I need to know which image is associated with which view. (Frontview - front.png)

And the last thing is it possible to change the presented views in the quadview screen?

Sorry for all the questions in my very first blenderartist post! Appreciate your help.