Note - the iviewer3D files should be downloaded somewhere like to
the desktop. Then double-click on it to open. There will be a loading
screen, and afterwards it will open showing a house front door. To navigate
use the q,w,e and s keys, and the arrows. Click on doors to see if they open
(both standard and sliders), once they do you can go through them. Go
outside and away from the house to get an overall look at it.