Here is the opposite example of setting 'static 1' (Animating off) via a cm2 file. The k value is -45.0, the staticValue is -90.0. In P6, this pose will unconditionally apply the staticValue of  -90°, regardless of the state of the Animating switch in the interface. However after applying the pose, setting the Animating off in the interface will revert the camera to the k value. I don't know if these poses will work the same in later versions of Poser.

{
#Animating off
version
    {
    number 4.01
    }

clearFigureKeys 1

camera MAIN_CAMERA
    {
    channels
        {
        rotateY yaw
            {
            keys
                {
                static  1
                k  0  -45
                sl  1
                spl
                sm
                }
            staticValue -90
            }
        }
    cameraModel poser
    }

doc
    {
    useCamera MAIN_CAMERA
    }
}

As this pose only affects one channel it could leave rotateY in a different state to the other channels in the main Camera. So you may need to to start a new scene after using it to be sure your camera is returned to its normal state.