Change server game mode?

How do I change the game server mode to conquest? anyone have any ideas it just black screens when I change the script config :/

Team Deathmatch = teamdeathmatch0
Rush = rushLarge0
Conquest = ????

Type in Win32Game:
-Game.DefaultLayerInclusion GameMode=XXXXXX
e.g. -Game.DefaultLayerInclusion GameMode=rushlarge0