I don't know about the requirements for SQL Server 2000, but have you looked to see what the minimum hardware and software requirements are for SQL Server 2000 64 bit? That might tell you something. That information should be in the documentation, or even on the MS website...
Scott Klein
Author - Professional SQL Server 2005 XML
http://www.wrox.com/WileyCDA/WroxTit...764597922.html