Originally Posted by Hezz

Yes,

but to work properly the vapor barrier needs to go next to or very close to the skin. Still, this method only gets you so much. You still have to increase the insulation. You don't see climbers using only vapor barriers and normal shoes. THey have multiple layers of insulation and well insulated boots.

However,

The vapor barrier next to the skin, then a thin wool sock then the shoe and a thick wool sock over the shoe might work pretty good for dry fall conditions. You can also make some pretty cheap shoe covers out of polar fleece for 2-3 dollars. Remnants of material at the fabric store are cheap and you can make some large sock like things. They will be warmer than most socks and you can make them black so they don't look so funny as wearing wool socks over shoes.