I dont know how many or you are familiar with Google Earth http://earth.google.com/ but if your not, click and try it out. Can you imagine how incredible a map like this would be? I'm not a computer guy or anything, but i assume it is totally unattainable......Unless one of you guys out there is up for it....
I'm not sure what you're suggesting. Risk is a pretty high-level game. If you want a lower level game with that much detail Command & Conquer or similar would be more suited.