I finally managed to play "Metal Slug 1", though with a small screen yet. But I realized that is the only game that runs with me, I tried "Metal Slug 2, 3, & 4" it says
- ms2_c1.rom [************************************************** **
or
- This ROM is unloaded because Gengo could not find a suitable drive to handle it

Same goes to King og Fighters 2001

but KOF 2002 starts loading, then the green screen, then black out and nothing happens till I stop the emulator.

Do I need more BIOS or different ones to support these games??