how to update in recalbox

[papersheet]

Hello,

I use recalbox 4.0 with PI 3 and gpio screen (pitft 2.8).
Now i need to use GPIO for my gamepad.
I see that in recalbox, mk_arcade_joystick_rpi is an old version.
Juste map 1 and 2 are possible. (not compatible with my tft screen)

My question is , How to update mk_arcade_joystick_rpi in recalbox to use map=4 for exemple?
Where find a compilated version, and where put the file?
Do you know a tuto?

Thank in advance for your help.

[AlfaJackal]

Interested aswell in this one...