Iano, I was sure I did it, but I checked it anyway. That game allows you to choose different resolutions, 640x480 was the selected one. GameEx also was indicated not to change resolutions. Slipstream19, yes I also tried that, I did a lot of combinations with the desktop, the debug mode, etc... By the way, to can play to that game in my cabinet I have to exit from the frontend and execute it directly from windows. It is not a big problem, but you know... I keep trying. Thank you guys for the answers, more suggestions are welcomed. Cheers!!