AR-Drone: Motor firmware


I’m developping my own application to send commands to ArDrone’s motors (embedded in PIC18). All went good until I see that my motors need to be reflashed.
The main board of my drone is dead from several years…

Is there any way to get the binary file I have to download in my motors?

I searched deeply on the net and don’t find any relevant information.
I also contacted Parrot official support with no success.

I ask the question in this forum because I’m now totally lost…

Thanks for reading.