Installing "SQL Server 2000 Client" and "SQL Server 2000 service pack 4"
The SQL Server 2000 Client is the driver, admin and query tools.  The service pack is an update for the tools and the server.

I'd recommend looking at a newer version.  Your options are SQL Server 2005, SQL Server 2008, SQL Server 2008 R2 and the soon to be released SQL Server 2012.