This video shows how to run SSX Tricky in progressive scan using PS2+OPL+GSM.
Configure GSM
- Enable GSM = On
- VMODE = HDTV 576p @50Hz
- Emulate FIELD flipping = On (this one is the crucial setting!)
It’s also possible to use GSM 480p/720p @60Hz, but you’ll need to compress/expand the output image vertically afterwards.
Before this discovery it was thought that it was impossible to play SSX Tricky and some other games with progressive scan video output.
Personally I have also used this trick to play ShoX, another EA game.