Huh you have problems too. . You might have to enter the aircraft.cfg using notepad and then edit the fuel flow scalar to a smaller account. If you want a true Concorde sim You should go for the sstsim one. My problem is that when flying normally especially with the nose down it starts waving from side to side and you cant correct it in time to land.  (You notice it on final) .

EDIT: And I forgot to say don't forget to back up the original. So if you dont like the results it's a simple process.