1.do the server as u do it normally (make GunzDB, set client , make server file etc...)
2.install hamachi
3.new network
4.see the the ip on top? usually starts with 5
5.put this ip in locator , config.xml system.xml (all plases where u will need the ip)
6.tell othere to download hamachi and join you network.
and thats it you have a server!