How do I set up a Co-op game using Zdaemon???

I have downloaded Zdaemon, but I don't quite get the instructions for setting up a game. I want to start a 2 player Co-op match, using the standard Doom2 levels.
I think I'm missing a file (zserver.cfg). Do I have to create this file myself? Help me pleeeeeez!!!!

you host games with zserver with the command -deathmatch 0 in it