Google SketchUp for Windows 6.0.515
http://fileforum.betanews.com/detail/Google_SketchUp_for_Windows/1146149393/1
from 
WinCustomize Forums
WinCustomize Forums
Haven't tried this personally, but I have heard some good things about it.
"Google SketchUp is an easy-to-learn 3D modeling program that enables you to explore the world in 3D. With just a few simple tools, you can create 3D models of houses, sheds, decks, home additions, woodworking projects - even space ships. And once you've built your models, you can place them in Google Earth, post them to the 3D Warehouse, or print hard copies."
"Google SketchUp is an easy-to-learn 3D modeling program that enables you to explore the world in 3D. With just a few simple tools, you can create 3D models of houses, sheds, decks, home additions, woodworking projects - even space ships. And once you've built your models, you can place them in Google Earth, post them to the 3D Warehouse, or print hard copies."
