I have been using Microsoft Streets and Trips 2007. Purchased a copy of 2011. When I tried to install it first needed me to install four other softwares. These included dot.net 4, access doa something or other, a direct X newest version, etc. I don't want to do that only update my maps. I don't need gps on my desktop computer or the other stuff. Is it possible to just update my maps? I cannot figure out which files to use to update maps or even if it is possible. Does Microsoft sell just map updates? Thanks for any advice. Leonard