Sectioned Cameras

Hey,

So I am working on an application, and I need for the 4 cameras I am using to have an equal space inside of the square of space I have. Right now, I am simply rotating cameras and applying a script I found to hide the quads I use to block sections of the camera. It might be easier to see what I am talking about in the image below.

Is there a better way to accomplish this? I have tried tinkering with some scripts and done a good amount of research without any luck.

Thank you to anyone who can help.

-David