//these constants would have to be defined in your package and game script
//simple methodwould be to just make a SE_Constants.txt, and #include them to the package and game scripts
let EV_PLAY_SE = 	EV_USER+11;
let SE_SHOT =		1;
let SE_SHOT2 =		2;
let SE_CHARGE =		3;
let SE_EXPLODE =	4;

//this init would go on the Package script

let SE_SHOT_OBJ =		ID_INVALID;
let SE_SHOT2_OBJ =		ID_INVALID;
let SE_CHARGE_OBJ =		ID_INVALID;
let SE_EXPLODE_OBJ =	ID_INVALID;

function InitSounds(){
	if(!IsCommonDataAreaExists("SE")){
		CreateCommonDataArea("SE");

		// Set up sound paths and put IDs in common data
		// Obviously if you don't have consistent paths, only call InitSounds() from one place

		SE_SHOT_OBJ = PrepareSE(dir~"shot00.wav");
		SE_SHOT2_OBJ = PrepareSE(dir~"shot01.wav");
		SE_CHARGE_OBJ = PrepareSE(dir~"charge.wav");
		SE_EXPLODE_OBJ = PrepareSE(dir~"explode.wav");

		function PrepareSE(path){
			let se = ObjSound_Create();
			ObjSound_Load(se, path);
			ObjSound_SetLoopEnable(se, false);
			ObjSound_SetSoundDivision(se, SOUND_SE);
			return se;
		}
	}
}

...

//in the package script
@Event{
	alternative(GetEventType)
	case(EV_PLAY_SE){
		let sound = GetEventArgument(0);
		alternative(sound)
		case(SE_SHOT){ObjSound_Play(SE_SHOT_OBJ);}
		case(SE_SHOT2){ObjSound_Play(SE_SHOT2_OBJ);}
		case(SE_CHARGE){ObjSound_Play(SE_CHARGE_OBJ);}
		case(SE_EXPLODE){ObjSound_Play(SE_EXPLODE_OBJ);}
	}
}

...

//in the game script
//to play SE_SHOT2,
NotifyEventAll(EV_PLAY_SE, SE_SHOT2);