Houses increase the population of your territories, enabling more units and vehicles to be produced
Not in empire earth; when a house is placed nearby a town center or a capitol, it gives units and towers nerby a moral boost.
Common Operating Machine Particularly Used for Technical, Entertainment and Research.
Sasi
perhaps this site would help, but the links seem to be down at the moment http://www.gameburnworld.com/gp/gamefixes/empireearth3.shtml
Go to the Game Extras (i think) it should be 3rd from the top going down. Click it and click the buttom in the middle. Create any map you wish and then save it.