Hi Ade, I think I haven't explained the issue with the key def properly.

From the config screen, pressing in the key def button, does nothing, the screen for keyboard configuration never appears, it worked the first time, but not after that. In gng-gui it works properly and it's mostly the same.

Regarding cps2emu, it's great news that you are working to reimplement the keyboard redefinition feature as it will give you more chances to improve it (combos?).