To import or upgrade a plug-in, follow these steps as explained in detail in Chapter 5, Plug-In Administration, in Sun N1 Service Provisioning System 5.2 System Administration Guide
In the Administrative section of the browser interface main window, click Plug-ins.
In the Action column of the Plug-ins page, click Import.
Navigate to the location of the JAR file.
If you are importing the WebSphere Plug-In for the first time, select the com.sun.was_3.0.jar file.
If you have already imported a previous version of the WebSphere Plug-In, select the com.sun.was_2.0_3.0.jar file.
Click the Continue to Import button.
When the import complete successfully, a plug-in details page appears and shows you the objects that the plug-in provides.