My mistake dogg,
You are correct about the router I am using being nothing more than NAT, but my IP is locked down tight, and virtually impenatrable by most computer hackers laying in wait for the netbios response.
I don't worry about spyware or viruses, because I am VERY vigilant about keeping spyware off by using adaware and spybot, and update my virus software a minimum of once per week. I have yet to lose anything because of hackers OR viruses. And I am not sharing my resources or bandwidth with uninvited apps.
I guess I should have taken the extra steps when making my recommendation to include the above information.
Good luck, and Happy Computing