I believe this is what you are looking for:
http://www.microsoft.com/download/en/details.aspx?id=18290
About six down from the top is SQL2000.MSDE-KB884525-SP4-x86-ENU.EXE download.
Editor: Added hyperlink
Chris Powell
George: You're kidding.
Elroy: Nope.
George: Then lie to me and say you're kidding.