Hi Tim,
Generally, follow whatever instructions are included with the install. There are instructions at the beginning of the install that are helpful to read. If it doesn't specifically tell you to add soemthing to the Scenery Library it isn't necessary to do so. Some FSG products also contain shorelines, airports, etc., in addition to terrain mesh, and those products will generally have their own Scenery Library entry required. I don't like to mess with people's configuration files with my installers, so i leave those tasks to be manual. Products that contain only terrain mesh files generally won't require their own Scenery Library entry, as a rule, because they are installed into folders that already are registered with the Scenery Library.
Hope this helps
