So, I was trying to run some games that actually require this bloody BIOS, so I've downloaded a lot of them throughout various websites but none of them works, I was trying to emualte King of Route 66 but with no success, I have the ROM and the BIOS in zip-files on the same directory, am I missing some file? It mentions that I could be missing a ROM or CHD image and I have no idea of what these things are (I mean, is there more things that I need to download?) because well... I only started using MAME today lol, can anyone help me please? The only game that I've tested so far that actually ran quite well was 1943: Kai (the one that only released in Japan)...

*No attachment because print screen doesn't work with the emulator lol*