Let us know if things go wrong, mitzevo. The program looks great, but that picture in Ryan's post about Firefox accessing the keyboard makes me wonder if this is a security program or a trojan that kidnaps your computer and demands a ransom divided in a thousand parts. I suppose this would make a good security suite, without any other program protecting the computer, as it seems to make a bunker of it.
Without any lightweight and shy firewall, I'd end up buying a router. Or setting up the old computer to be a firewall (tricky...)