Thanks abelenki for the quick reply(s). I went through and re-installed the whole thing ( MESS ) and it seems I was launching the games with MESSUI, this still has nag screen. However when launched with MESS.exe the nag screens are gone. There is still a very brief "Initializing" window, can this also be removed? Did I install something wrong or does MESSUI not support no-nag, or need additional changes? This is not super important, since I am using MESS in Hyperspin to launch games but just to know. EDIT: After setting rom\bios path in MESSUI and launching game for the first time nag screen exists, close MESSUI then re-open and they are gone. Only "Initializing" screen remains.