How do I "flood server"?

Right i’ve made my own listen server and it works cause 2 of my friends played on it with me at a good ping. How would i be able to set the server so it plays in flood mode. What do i do once i install the mod, do i just choose a map which works in flood mode and they can play?

You can try changing it from the Create Server’s Options tab.

Add me: modegg I’m sure to help