Microsoft® Office Project Server® 2003 Service Pack 3 (SP3) represents a major evolution in security for Project Server 2003. It further hardens Project Server against potential attacks and other security threats. This service pack also includes fixes that have been previously released as separate updates for Project Server 2003.
Download: Project Server 2003 Service Pack 3 (SP3) Download: Project Server 2003 Service Pack 3 (SP3) for Multilingual User Interface Pack 
News source: Microsoft
