@DAM Thanks I got it working by getting a CPS2 rom set and placing it in the FBA folder. Some of them worked in the MAME folder but I had more success with FBA.
Hello
it's not possible , you need to compile your own recalbox.
This core is already available in recalbox.
You need to go :
Emulationstation Menu > game options > choose your default core.
Or
Select your game
select button
edit metadata game
choose emulator : libretro
choose core : try a different.