How does green border work?

I downloaded greenborder this evening as it sounds like a good tool - the catchy name is because each browser/directory that is protected by the software has a green border around the window - a nice simple, catchy name. It is worth architecture page gives a little more information on what it does, although I'm not really sure how you can virtualise a web browser. Anyway, the software is incompatible with encryption, Windows One Care, needs a slight hack to work with firefox and needs some funky registry permission changes in some circumstances.
Sorry guys if I sound like I'm bashing the product without trying it, but some of the marketing details need to be ironed out before I'm going to try it out.