Making Driver That Emulates Kinect As Mouse?

I would like to create a driver that emulates each person on the kinect as a mouse using the windows DDK (Driver development kit). For instance, four people on the kinect and the kinect mouse will have create four instaces of the device or recoginize the four people as four mice. I have a theory I haven't tested but I still think it's possible to do this. What I want to do I create a modified mouse driver that will accept when a person closes their fist as a mouse click (left mouse click if done with left hand and might change this to a different gesture but want a default action until i work out interaction flaws). Also, how do I get the mouse coordinates from the kinects position on the screen? Plan on using on windows 7 32 and 64 bit flavors.