when you want to install and use the the SQL Server 2000 (64-bit),you must know some components and programes are limited or supported:
1.In this release of SQL Server 2000 (64-bit), child feature selection is more limited than in the 32-bit version of SQL Server 2000.
2. Remote installation is not supported.
3.Only the Enterprise Edition is available. The SQL Server 2000 (64-bit) Desktop Engine is not available
4.The Network Library configuration page is not included in SQL Server 2000 (64-bit).
5.Configuration of Network Libraries is not supported in Setup, but is still supported by the SQL Server Network Utility.
6.Code samples are not installed by Setup.
7.SQL Mail is not supported in this release of SQL Server 2000 (64-bit).
8.Tools must be installed from the SQL Server 2000 (64-bit) RTM CD. Tools from any other CD cannot be installed as part of an instance of SQL Server 2000 (64-bit).
9.The DB-Library programming model is not supported in SQL Server 2000 (64-bit), and it has not been ported to the 64-bit Windows operating system