As far as I'm aware (though I'm no expert) there is little risk of intrusion because it is blocked by your firewall. YOU DO HAVE A FIREWALL??? If not, download and install MS Security Essentials. It's free and works. It may not be as good as a paid-for security package, but is a lot better than nothing!!!
Anyway, to set up wamp on a server:
- Install wamp just as you did in the workstation. Then:
_a) Open access to wamp for other PCs on your network. I forget how to do that but it must be pretty obvious if I worked out how to do it.
_b) Check the network address of the server. You can do that on your nethub, or on the server itself.
_c) Amend the shortcut that launches your site to point to the server.