i never played pitboss game. i just wonder how it works(only need an e-mail address? don't need ip?)
as a joiner, what should i do? and so as a server?
what civ4 version pitboss supports?
where download the latest pitboss version?

best regards

Have a read of this.

It should help on how to run a game.

http://forums.civfanatics.com/showthread.php?t=174594

And to play a game you just need to be able to log in under the multiplayer menu.