I heard someone downloaded a car into FSX and was driving it around the airport.
How is that done?
Just look on FSX download websites. I'm not too sure if Avsim have any but I think FlightSim.com do. Just signup for free, do a search or look in the categories, download the files and follow the instructions.
EDIT: Go to FlightSim.com, signup and search for jeepfsx (for a jeep) or sirgtxsx (for a motor-yacht)
Jeep 4X4 Gmax model Includes highly animated driver , windows , doors , gear shift , motion sensitive interior parts react to bumps , animated suspension , a removeable roof ,custom gauge set , custom lighting and animated working handheld gps in the glovebox .
You can get it here ➡