$preparedStmt = '
				INSERT INTO users SET
					username = ?,
					firstname = ?,
					lastname = ?,
					email = ?,
					password = ?
					' . $addfieldsString;
			$insertUser = $core->db->prepare($preparedStmt);
			$params = array_merge((array) ('sssss'.$paramString), $data,(array) (md5($pw)), $fieldarray);

			call_user_func_array(array($insertUser, "bind_param"),$core->db->refValues($params));