I'm a new member here so I'm not so familiar with Flightsim.com. Most likely
Train-sim.com

I like to play Microsoft's Train Simulator alot and always like downloading new
locomotives and rollig stock. But when I got to play FS2000, I really loved it
and always liked downloading new aircraft. However I would actually like to
edit the defualt "World Travel Airlines" Boeing 777 so I can use it as a
scenery object in Microsft Train Simulator. But FS2000's file format is .MDL
and MSTS's format is .s. Is it possible to convert .MDL files to .3ds files?