Once the portlet is installed through the APM, should appear as an option to the user. But you can also create a customized portlet (static) for users at /dotlrn/admin/portal-templates.
If you want to add it to new users (those who has not yet a user-portal), you must put it at the template for user-portals, manually entering it to the database (sorry, I think there's no UI for this case). Look at portal::create (portal::create.create_new_portal) for more info. And if you need it for users that already have a portal, you will need to create an script to add it in the proper place.
