RM 2.0 RM discussion tab after the fact


Whenever a resource is posted into a category, a thread can automatically be created in a designated forum. This allows a separate discussion for each resource. If the Automatically create thread in forum option is configured, the resource will link to the discussion thread and the discussion thread will link back to the related resource. If this value is changed, it will not apply to any existing resources.
Would you be able to add the discussion tab on each item after the fact or does it have to be only when you add the RM?