On the Select Components screen, you can choose components and subcomponents to install, or to reinstall if not set up initially. Options for a typical installation are selected by default. Select the components to install or reinstall and clear all others.
Note You cannot remove components by clearing check boxes on this screen. The only way to remove installed components is to remove SQL Server entirely.
Components
Lists the main components of SQL Server
Sub-components
Lists the sub-components available for the selected component
SQL Server components and respective subcomponents include:
How to add components to an instance of SQL Server 2000 (Setup)