Are you able to directly drop system files under bios for retrobat?

[bughaver]

I've copied the contents of system and dropped them directly into bios. This has overwritten some files and folders.. is this the intent of how it should be done? some bios like psx and ps2 were not detected by retrobat.

This was the version I used.

[djismgaming]

Retrobat has it's own pack.
I've just tested this one minutes ago with PS2 and works. Just extract into the bios folder for Retrobat. Don;t try to install them in the folders pre-existing in the folder by Retrobat

Pick Retrobat_BIOS-Pack_3.1.zip