Insurgency Sandstorm Map and Scenario Management

To the point: Where do I, or how do I create a list of maps and the type of play (pvp, co-op etc) for Insurgency Sandstorm?

More in depth: I do see in the server configuration page a field called “map” and another one called “Scenario”. I’m able to put in the names I want and that works correctly. What I want to do is have a list of all the maps and mods along with setting them all as co-op. I had a paid service before in which I edited the game.ini file the “gameUserSettings”, mapcycle.txt and mods files (along with others). Do I do the same when using amp? Sorry, I’m a newbie just learning.