SP4 for SQL Server 2000

Microsoft has released the Service Pack 4 for SQL Server 2000 -
http://www.microsoft.com/sql/downloads/2000/sp4.asp

Some of the highlights -
With Microsoft Windows Server 2003 x64 Edition, SP4 provides support for 32-bit SQL Server applications on 64-bit architectures using the Windows on Windows emulator (WOW64). For more information on specific 64-bit platforms supported, see the Windows Server 2003 x64 Editions Product Overview .

With SP4, you can leverage 64-bit processor architectures using 32-bit SQL Server applications when running in WOW64.