Alright... non-lan multiply, how?

My Dad and I just got two copies of this game. Loved the first one, couldn't find the second one when it came out.

We have it now---is there a way to do IP to IP mutiplayer play? Is there a way to play the game cooperatively?

You can't play cooperatively unfortunately. As for multiplayer, I believe someone has to host the game. And you need to know there IP address. I did it before, many years back. However, it has been a long time and I can't recall all the details. There are also a couple of good multiplayer mods, such as WhatRocks and Epic online. They might help in establishing connections. Don't quote me though...