code: public function addQuest (Neuron_GameServer_Quest $quest)
  	{
  		$db = Neuron_DB_Database::getInstance ();
  		
  		// Check if this is the only one
  		$chk = $db->query
  		("
  			SELECT
  				plid
  			FROM
  				n_players_quests
  			WHERE
  				plid = {$this->objProfile->getId ()} AND
  				q_id = {$quest->getId ()}
  		");
  		
  		if (count ($chk) == 0)
  		{
  			$db->query
  			("
  				INSERT INTO
  					n_players_quests
  				SET
  					plid = {$this->objProfile->getId ()},
  					q_id = {$quest->getId ()}
  			");
  		}
  		
  		$quest->onStart ($this->objProfile);
  	}
docs: /*
  Quests