I found several sites dealing with windows on Main Street, USA, but none with the amount of detail you are looking for. The best site is this one on the windows at Disneyland, some of which are repeated at WDW. http://www.laughingplace.com/Info-ID-DL-Windows.asp
Another good site has pictures of most of the WDW windows, but no description: http://www.magictrips.com/parks/mk/mainstreet/
Hope this helps!