Does the following work for you?
Code:
import viz
import vizact
viz.go()
gallery = viz.addChild('gallery.ive')
import viztracker
tracker = viztracker.KeyboardMouse6DOF()
fixedTracker = viz.addGroup()
link = viz.link(fixedTracker,viz.MainView)
link.postEuler([180,0,0])
def updateView():
x,y,z = tracker.getPosition()
fixedTracker.setPosition(x,1.8,z)
fixedTracker.setEuler(tracker.getEuler())
vizact.ontimer(0,updateView)