My bad, the link to
http://host-a.trafficguardian.com/tour/index.html will NOT work directly ( it will redirect you to the index page ), because it is set up for deeplink protection as well. You will have to follow the "take the tour" link to let you in.
Btw, remember that the script has a timeout period, within which a legal surfer that has visited the gallery will be able to hotlink to the protected content, until the time out expires ( It is set to 5 minutes on the demo site ).