Scenario: NaV II, MP game or Scenario

[Septimius Severus]

Was wondering whether anyone knew at what point an MP game becomes a "Scenario", as in the case with NaV II:

http://forum.shrapnelgames.com/showthread.php?t=45227

http://forum.shrapnelgames.com/showp...31&postcount=2

Is a scenario just a custom made map with certain special features, encounters, provinces, etc added to the .map file or can scenarios be MP games, with many of these elements present, such as custom pretenders, specially set up provinces, certain victory conditions, custom themes, pretender choices, a storyline, etc?

Thanks.