Thanks for posting the link! Reflectix is a great material for insulation. A friend of mine used it to cover over his dome at BurningMan? a few years ago, and gave me some pieces which I use as sun-screens in my car when it's parked. It really cuts down a lot on the interior heat.
Please also consider logging in to the Wiki and signing your username when you post things. Above, you mention how you assembled the shelter, but we don't know who you are! :-) You can find detailed instructions on the HowToLogIn page. The quick version is: Make sure your browser will accept cookies, click on either the "Preferences" or "Create User ID" link on any wiki page, and when it gives you your user ID number, *write it down*.
Then, whenever you add to a page like this, you can sign your name, and it will provide a link back to your personal wiki page, where you can let people know about your other interests and projects.
Also, check out the new DesignScienceCommunity:HomePage That's a whole new wiki entirely devoted to the field of Design Science. It's already growing quickly, and we hope to build it into a central point for people to meet and share their ideas and projects. Hope to see you there!