So im pretty new to this stuff so i found a game inwanted to add marvel vs capcom 2 but i cant seem to add it correctly?

So i have a rasberry pi with recal box i bought threw sumosys

I have been using winscp to put roms for other systems on there i have a .rar for the parent game and the .rar for the american version i didnt see a bios come with it when i dld it but i seen it ran on naiomi so i downloaded that and have thelat rar aswell qhat do i do lol