Hi Sage,
Yes, the setdisplayarea tool works with all eye trackers that are compatible with the Tobii Gaze SDK, including PCEye Go with firmware version 1.1.5 or above.
In the latest Gaze SDK release, we have created a semi-graphical tool to help you with the calculations. It is basically a web page where you insert your measurements and get provided with the parameters you need for the setdisplayarea command. Please net us know if this helps.