Howto:Aerial refueling: Difference between revisions

Use your operating system's search facility to locate this if you don't know where it is).  Open preferences.xml in a text editor (e.g. notepad if on windows) and search for the <ai> </ai> tags.  Place a line like <code><scenario>refueling_demo</scenario></code> somewhere within the <ai> tags; you should see other scenarios already there too, perhaps commented out : i.e. with <! --  --> ).