Douglas DC-7 C Altitalia Credits: Original aircraft design by Tom Gibson and Harry Follas Adaptation for FSX and panel by Philippe Wallaert Installation: Unzip Douglas_DC7.zip in C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\SimObjects\Airplanes\ copy Callout_Sound.dll in C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\GAUGES\ copy CallOutB folder in C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\Sound\ NB: When Master Warning or Master Caution is activated, an alert sound is produced. Click on the gauge to stop it. Click on button "Alarm Horn" situated near the Master Warning gauge to activate/deactivate the sound. Enjoy !