So, if possible, adding that as a file name option (scph7003.bin) might help usability a bit. I think the NA BIOS ROM for SCPH-7003 is exactly the same as SCPH-5501's (check the BIOS version of the two models, they match), as the dump I have has the same SHA1 hash as that of SCPH-5501.
Show:Today's Messages ::Show Polls ::Message Navigator For now, it's very simple to rename the SCPH-7003 ROM to scph5501.bin maybe you could make a note to do this in the documentation, if having multiple ROMs available for each regional system proves to be a difficult implementation problem.
The three BIOS files needed by Mednafen (and RetroArch/OpenEmu, if using Mednafen as core).Models:scph5500 - 3.0 NTSC-J ()scph5501 - 3.0 NTSC-U/C.