extending SteamVR externalcamera.cfg?

Hello, has anyone had any experience in modifying or extending the SteamVR Externalcamera accessible with externalcamera.cfg? It now creates a view with the four quadrants and you can set the camera position of the external camera (and there are ways to control to which controller it is attached to).

I would be interested in...
- Modifying the content of the four quadrants, the contents of what they are showing.
- Removing some of the quadrants.
- Adding a second external camera from a different angle... Perhaps to a second / third monitor.

 

Its all just C# code inside the file SteamVR_ExternalCamera.cs inide the \SteamVR\Scripts folder.

 

Looking at SteamVR_ExternalCamera.cs, I'm a bit confused. I'm pretty sure that it's not one that defines the quadrants... The four boxes and what they contain / render, and how their layout on the screen gets created.

 

May be that my version of the sdk is outdated but i have functions called
AttachToCamera
RenderNear
RenderFar

that are called from RenderExternalCamera in the file SteamVR_Render.cs
that fuctions do setup that split quad screen view.

If its not in that file search your whole project for externalcamera.cfg and look where its turning up.