I'm being dim.
By creating my own command line as follows:-
D:\GameServer\SandStorm\Insurgency\Binaries\Win64\InsurgencyServer-Win64-Shipping.exe Farmhouse?ScenarioFarmhouse_Checkpoint_Security?lighting=Night?port=27038?queryport=27039?MaxPlayers=6?Pasword=XXXXXX -log -EnableCheats -NoEAC -MapCycle=Mapcycle - All Security
Note: "?lighting=Night"
I then have a server where going into the ADMIN options and changing the level will change to NIGHT for any and all maps. ie: I cannot then play the DAY version!
How can I simply get the server, so the ADMIN can change LEVEL to either DAY or NIGHT flavours?