Hi.MADDOG 2006 do use Flightplans in FS9 .PLN format.If you check the "MADDOG 2006 Manager & Setup". In the Fuel/Route Planer tab, there can you Load flight plans in .PLN format. But you have to change the filformat in the window that open when you press Load, to see them and Load it from the Flight simulator files Map.Hope it Helps.Kai.