A friend and I are trying to host an IP and since we both have wi-fi, we would have to set-up a VPN and do a whole bunch of other stuff. The page with a list of Postal 2 servers, we've tried to connect to all of them, either they're undefined, running an older version of the game, or require a password. If anybody has set-up a compatible server, let me know if my friend and I could join you :)
(and by the way, incredible mod. I've been waiting for something like this to revive this game once again since Paradise Lost & Hell Rising)