The cores that request these files are: Sony - PlayStation (Beetle PSX HW), Sony - PlayStation (Beetle PSX), Sony - PlayStation (PCSX ReARMed). scph5500.bin (PS1 JP BIOS), scph5501.bin (PS1 US BIOS) ...

has support for minUI's psx roms folder structure. if you want to use it with minUI or another system that needs each ps1 rom to be in it's own folder, just edit the script and set CREATE_FOLDERS to ...