public static function addScenarioFromYml($key){
		$cfg = Config::inst()->get('SimpleListField', 'Scenarios');
		
		if( isset($cfg[$key]) ){
			if( (isset($cfg[$key]['preload']) && !$cfg[$key]['preload']) || !isset($cfg[$key]['preload']) ){
				self::$scenarios[$key] = $cfg[$key];
			}
		}
	}