Posted 29 March 2013 - 13:22
Disable the dhcp on routers and assign static IP addresses to machines on your network, link them together via ethernet cable (the routers), and use the gateway ip address to tell which pc's to use whichever router.
Rogers Router - Local ip address 192.168.0.1
Bell Router - Local IP address 192.168.0.2
Media server - IP address 192.168.0.3 - Gateway 192.168.0.2
Your PC - IP Address 192.168.0.4 - Gateway 192.168.0.1
You can then follow this on and assign each machine its own gateway to which ever provider you wish. This is the simpliest solution I can think of for you, and with little experience required to achieve it. All machines then use the same network, just access the internet from which ever provider you wish them to use.