You can also get the RPS 3D PDF from Render Plus
http://forums.renderplus.com/wiki/index.php?title=RPS_3D_PDF The 3D models aren't as nice as the Hypercosm ones but you don't need to download any player if you have Adobe Reader Version 7.0.7 or newer, or Adobe Acrobat.
I have the 3D models scattered all around on my website. Ckeckout one of them by clicking the image at the top of this page.
http://woodsshop.com/tea_house_plans.htm