@Alexis-Cortesn Thanks. I will look into your advice but it will take me some time as I am not that much into .ini files and modifying them on my own. For now it seems that some of the PSP roms can also be ran on the other emulator - Libretro PPSSPP and that one seems to work well with the joysticks.
@Magaki alors, j'ai de la chance, le secureboot est désactivé, je peux booter sur ce que je veux. mais je ne peux toujours pas installer Recalbox ( ou batocera ) .