Its probably impossible, but imagine a yeti3d graphics "hook" on PSX4ALL. It would use YetiEngine to render graphics. Graphics would be rendered at a higher speed and i guess sound would be able to be enabled by default.
Dreams, dreams.. Yet, no devs on the dingoo... shit, if i knew how to code..
Just tought about a guitar hero engine. 3 button style, with some simple but nice effects on the back.
Still, i dunno how would songs be added, i thought about doing just like in rhythm zone, analyse song and generate the table. Still, i guess it would be too much work tough...