Is there a way to assign the setturbo function to a gamepad button in mdk?

I read in another thread about joystick/gamepads that someone eluded to that it could be done.

It's not in the joystick options menu, but it is in the keyboard option menu.

Is there a specific command that can be put in the cfg file to make it work? Unfortunately, the cfg is a bit cryptic so I couldn't figure it on my own.

I'm using a logitech dual action gamepad.

Thanks.