Xifon, I hate to tell you this... but a "serious" flight simulator costs IL2 x 10^6 €... and is used to train real pilots, not middle-aged gamers... and you normally don't find them in the 10$ bin of games shops together with Pacman and The Sim's... and above all they don't run smoothly on a home computer ...
. Just look at this one:
http://www.thalesgroup.com/Portfolio...ator/?pid=6907
Cheers,
Insuber