How can I assign AI aardvark planes to the default flight sim 2004 flight plans (replace default aircraft with aardvark ones) Thanks a lot in advanceTyler

There is a freeware program called "AITM" OR "AI TRAFFIC MOVER" and it will do what you want...After loading the Flightplan.txt file, click on Tools, Flightplan Aircraft Editor...Menu = Available Aircraft, is all currently used as AIMenu = Available FS aircraft At at the bottom of the menu is all than _can_ be used. If the one you want to use, is not highlighted in BLUE, it must _first_ be highlighted, then click on ADD, to make it available for AI.Then in the TOP Menu, highlight the existing aircraft you want to replace. Click on the button next to line below the TOP menu, to see the "dropdown List". (Above the bottom menu.) Choose the aircraft you want to replace it with...Press Substitute button, then answer YES.It will replace the existing aircraft, in all flights.Just make sure when doing this, you substitute an aircraft which can fly the same distances the original aircraft flew.If you want, you can also Highlight the aircraft you _replaced_ and click on Delete. That only deletes if from the "aircraft.txt" list used for AI, it does not delete it from your FlightSim...