I absolutely love the rubber floors because salt goes crazy on carpet in the winter. Now I can just scrub it a bit and vacuum it all out. Its also a pretty smooth surface so little things don't get lodged in corners. I put some carpets down for now but they slide around a little because they aren't fastened.
As for the 4x4 stick selector I'm not sure. Is yours a Laramie or SLT or something? Do you switch into 4wd when you're moving or stopped?