Dr.Sound

hey guys, just registered here
my problem below:

i've never set up a VPN connection from scratch before, but my company needs employees in europe to be able to access files on our network here.

i got one server running Win 2000 Server.
it manages active directory.
it has 1 gigabit network card.
internet connction is DSL, with with DHCP and NAT through a linksys router.


i just installed another server running windows 2003 standard.
on the same domain as main server.
so far it's a file server.
it has 1 gigabit network card.

what do i need to set up either as a VPN server.
i've already installed VPN services.
DO I NEED 2 NETWORK CARDS??
one for internal network and one dedicated to VPN?

any info will help.
thanks.