layouts with prism

I'm evaluating your docking library (which looks very good so far) but I can't figure out how to programatically create layouts using prism.

I see from the layouts sample that I need to use the <documentwindow>.MoveTo...() methods, and <toolbarwindow>.Dock(...) methods. But how to I get to the documentwindow and toolbarwindow types if I'm starting with your Prism example?

thanks,