I looked around the RS-97 and Oswan was simply running too slow on it, so i've decided to look around it and fix some issues,
namely audio code and adding frameskip support. I'll soon add it to next firmware but since some games on the GCW0 might still not reach fullspeed, i've decided to turn on frameskip for that build as well.
This should make most games run properly on the GCW0, but it might introduce some speed issues.
Please give it a try, as my GCW0 is for now currently broken...