A little back story before my question - I just got a Lumia 928, my wife has a Lumia 822, and we just moved my daughter to my old Lumia 822 from an HTC Trophy. It didn't matter to us before but, now with us all on WP8, I would like my daughter to have her own Xbox Game signon with her own avatar while still having the ability to access our Xbox Music Pass. Can this be done?