Good security advise can only be given if I know the exact situation at your place, but I will give you a few tips to keep in mind.

  • Security starts with the user(s).
  • People/compnanies can claim/say a lot. Always check it yourself.
  • Windows SP2 firewall only protects/checks inbound, not outbound.

I started a thread here a while ago about security. I suggest you use the search option to find it. I think you will find the things I said there usefull.

And here are two webistes that are also worth while reading:
http://www.markusjansson.net/exp.html
http://www.nsa.gov/snac/

Good luck with installing/using the new system.