There are some CameraPanel commands, I'll experiment with those and get back to you ...
... nope, we are missing a command to shift the camera centre wrt to the screen, at the moment the camera origin is fixed to the centre of the screen, for what you want to do we need a command to specify an offset amount, or alternatively to directly specify the X,Y % screen position to use for the camera origin.
Thinking about it some more, as the commands seem to have a camera number parameter, Lee is obviously working towards multiple cameras, maybe for screen-in-screen or multiple player views. If so and as part of the DX-11 update maybe suggest to him adding extra Lua commands to directly control where the camera(s) are rendered on screen and how much of the screen to use, that way the engine doesn't have to render to parts of the screen that you are covering up with the HUD elements.
If you can drag his attention to this thread I think as soon as he sees your images he will see the potential.
Been there, done that, got all the T-Shirts!