Does anyone know how hard it would be to put the rubber mat in truck instead of carpet. i hate the carpet and i have a leak and it freezes in the winter and seeps in in the winter. And can anyone tell me why it might be leaking. the vent window leaks right around the corner that turns upward. But the seal isn't that bad, the window doesn't look like it's closing all the way. What else could it be, do i need a new seal or what.