Download the Windows2003 SP2 32bit version (WindowsServer2003-KB914961-SP2-x86-ENU) and the x64 SP2 (WindowsServer2003.WindowsXP-KB914961-SP2-x64-ENU) files from MS.  Extract them both with your favorite compatible file archive util ( I used 7zip).  Copy the binary files (dll/exe/msi) from the 32bit version’s ‘update’ folder into the ‘update’ folder on the 64bit version. Then run update /integrate:c:CD1 etc…