Beefburg

I will soon be moving to my new apartment close to Chamonix. I will be commuting each week via Geneva airport living in France 3 days a week. I believe I will not be required to become a French citizen. My question concerns use of motor vehicles in France. I would like to leave a vehicle in Chamonix permenently for use at the weekend. Is it possible to leave an English-registered vehicle permenently in France without re-registering it (and perhaps return to England annually for MOT). What would be the situation as regards tax and insurance? I actually intend to keep a car at Geneva airport (Switzerland) for the journey to/from Chamonix plus routine use in and around Chamonix, and also a motorcycle permanently in Chamonix. I guess the rules concerning each of these is different (as the car will be in and out of France weekly). Any help would be very much appreciated.