hello,
about p3d:
i use nvda to access it, i have version2, which is fully supported
when you start it, press tab until you focus on the change button then press space and then select your aircraft from the data grid, then press enter on your aircraft
then press shift+tab until you focus on flight planner amt press enter, then create a flight plan (write icao code of the airports, because it cant read list to select it then select your runway and gate, then press enter and select your destination then flight type like ifr or vfr, then select the way of navigating like gps navigation or vor2vor and with screen review, move up with insert+numpad8 then go right, if you found ok, press insert+numpad slash and then choose yes, otherwise if you didnt here ok, move up again with insert+8 then navigate again
i didnt tried x-plane, so i cant say anything about it
if you have any questions, ask
also, guys you can use this to fly the plane in fsx/p3d