amlavor

Hello all I have one question that is taking me... I have a network with 7 computer as it follows Internet -> Modem -> Router (wifi) -> Computers What I need to do is, set a windows server 2008 to work as data server and as a NAT service, but I cant get it to work, I know the router by itself can do it, but not as quite good as a server could do. Im thinking of set the server between the Modem -> "Server" -> Router -> Computers , but the router would keep the wifi IP of the network, and repassing only its own IP to Server which is useless for a NAT rules. If I place the server after the Router -> "Server" -> Computers , I will have to set a AD-HOC connection, wich wouldnt be apropriate for security and performance... What you guys would suggest. thanks in advance Andy ps.hope I was clear. in my mind I see it so easy...lol..