Adding another camera node to shapebase

For our game we want our hero to be able to switch between 3 different cameras, third person, first person, and to a different viewpoint on another part of his body. Looking quickly through the SDK, I thought perhaps i could add another variable to shapebase which kept track of another node similar to eyenode and cameranode in order to do this. However, I'm unsure how to go from keeping track of this new node on the model to implementing a new mode to switch to this camera node? Can anyone help or point me to another direction in which i could accomplish this?

Thanks in advance