OPENVPN SETUP (using Commercial Version)

Hi We would like to setup and openvpn box on windows 2008 box that allows a 1000 connections. each connection can see the server but connections cannot see each other. It needs to run as a windows service. We want to use the commercial version and have the customer be able to sign in with a username and self install using a package. Would like to use the vhd package from openvpn .net. Ajay