Hi Jazz777

You should open the aircraft.cfg file with Notepad. The file is located in <FSX Root Folder>\SimObjects\Airplanes\CS_B757-200. If you installed FSX in the default location, you would find the file in C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\SimObjects\Airplanes\CS_B757-200 or C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\SimObjects\Airplanes\CS_B757-200 if you use Vista/Windows 7.