Thanks a lot, your support really help I downloaded the mame map and it works briliantly (is there a possibility within this mame.map to use option like "no clones, unless better"?) I really enjoy this option in standard mame settings. I use frontend in frontend, becuase retroarch inbuilt frontend looks bad, and is not so friendly to navigate. Check this "crt royale" shader, with small tweaks in settings, it can turn your lcd/plasma monitor to 15 khz arcade monitor