does may be this the solution? "In FBA and Mame, press Select to add a credit. In Mame, if your Hotkey is Select, you will have to quit with R1 + Start (in order to have select as coin)" I paste it from the manual... I'm using a ps3 compatibile controller (gasiaco), so should I have to modify exit button on retroarchcustom.cfg or simply configure another hotkey in emulationstation?