I have a Node that I have disabled viewing of threads to unregistered guests. When they click through they get the message 'There are no threads to display' which could make them think there is no content at all. I would like this to instead display that they should login to view the content (edit the phrase?), or present them with the login form (template edit?). Could somebody please help with the best way to do this? I'm not sure if it's achievable by only changing permissions somehow. Thanks.