I ran CAT5 to all my TV's, From the RG, I ran one line to a GigE Switch from there I ran all my non-TV devices (XBox, Boxee, Bluray, Computers), But that left me only 3 Ports on the RG but 4 TVs. So I plugged in a 10/100 switch right beside the RG and plugged all the STB's into the switch.
Now as Macman said MTS doesn't support it, so they tested each STB connected to the RG, and I had to reconnect them to the switch myself after they left.
Been running that way for months with out any issues.
The beauty of my setup is that all my non-TV are in effect on a GIGE network and TV is on a 10/100, my non-TV devices only hit 10/100 when I access the internet.