hello

our company are setting up a new small office in europe. i have knocked up a box with win 2003 as a file server so that they dont have to vpn to our office in the uk all the time but then i realised that there would be a problem with authentication within the domain. So now the file server has to be connected via vpn at all times as do our users.
if i add the new fileserver as a second domain controller would it have to be connected via vpn to our network to authenticate or could it authenitcate its own users??. thus saving some bandwidth for me.
if i do add a new domain controller, what would be the best way for me to go about it??

cheers
sam