I guess I should have been more specific. I didn't want to sound like I was "selling" a program. The one I am using is Broderbund 3D Home Design Suite. I would think that any program that you could use to show floor plans and maybe 3D views would be usable though. I was thinking that especially the 3D view might be most interesting. Some programs even let you color in the siding, etc. Carol Wilkerson