To program your XFinity remote control, first, go to the Comcast Customer Support/remote listing page. Then, select your remote from the listing and then press the TV button on your Comcast remote. After that, press and hold the "Setup" button and then enter the multi-digit manufacturer's code. Next, point your Comcast remote at your TV and then press the "Power" button. For more information, visit http://www.ehow.com/how_5314027_program-comcast-remote-tv.html.