This might work...add the following to your description.ext:
titleParam1 = "Options"
valuesParam1[] = {0,1};
defValueParam1 = 0;
textsParam1[] = {"Artillery off", "Artillery on"};
...and in init.sqs you could have
artypieces = [art1, art2, art3];
?(param1 == 0): "deleteVehicle _x" forEach artypieces
(This probably belongs in the Multiplayer forum...)