@Damoono -- which Shaw PVR do you currently have?
If you have the Arris Gateway, you can use MoCA ("Multimedia over Cable A.") to connect a set-top box to a coaxial wall-plate in the secondary room. The coaxial-cables inside your walls feed the signals to that set-top box, with HDMI-output to your secondary TV.
If you have the BlueCurve, it has a private WiFi network to communicate to a different set-top box in the secondary room.