Control Mapping for dualshock 3 (RetroPie)

[Concat]

Man it feels lonely in here.

Anyways, I've tried my best to figure this out myself. It seems SDLjoystick.h holds they key... and maybe keycodes? and keymaps? sigh...

Is anyone familiar with the confusing mapping structures employed in PPSSPP? All I want to do is control the menu with my dualshock 3. I know someone has the answer and you will be my best friend if you explain what I need to do

I am assuming SDLJoyButtonMap[x] is the button that is sent to ppsspp. It is then mapped to some NKCODE_XXX variable, which is again mapped to the ppsspp controls...? So all I need to do is change the SDLJoyButtonMap[x]=NKCODE_XXX entries in SDLjoystick.h?

But how do I know what NKCODE_BUTTON_6 is mapped to in ppsspp? It sounds like an awful lot of trial and error. That and I'm not smart enough for this.