After you have installed WebSphere Business Integration Server Express or Express Plus, you can later install additional components. To do this, select the Install Product button from the left panel of the Launchpad. The Launchpad then offers screens from which you can select components to install, as detailed in Custom installation. If you have already installed some components from a particular screen, the screen appears but the check boxes beside components that are already installed are disabled.
The Launchpad determines whether additional software prerequisites are required based on your new selections and leads you through their installation as well as the installation of the new WebSphere Business Integration Server Express or Express Plus components.