Hi,
The Avatar.Person class is part of the older style avatars, it problably doesn't have any use for you.
It should be pretty simple to feed headtracking data into an avatar. This method should work in conjuction with built-in animations.
Code:
avatar = viz.add('avatar.cfg')
head = avatar.getbone('skel_Head')
#Lock the head bone so that we can manually control it
head.lock()
def mytimer(num):
#Apply some rotation to the head
head.rotate(ori)
Let me know if you need anymore help with this