I recently switched from Comcast to DirecTV and I loved my Tivo that I purchased for Comcast (Netflix, etc). I managed to get the DirecTV Tivo HD DVR and I was wondering how to network it with my other Tivo Series 3 model. Is this possible? If not, what are the options I can do if I wish to keep DirecTV. Does DirecTV offer a cable card or is their equipment completely proprietary. Please answer all the questions. Thanks.