Yup changed them myself. Not a big deal, takes about 30 minutes..
I think the Canadian Tire Pressure sensor will only complain if the tires have differetn pressure relatively amongst each other.
So if you put on new tires, even through they are different from the stock, as long as they all have the same pressure, the system wont complain. This is why the US system is better, i think. It makes sure that your pressure is Correct!