According to your diagram, if you swapped where P2 and P3 stood then you can have the same shader on all the games and things would be "smoother" with the video orientation being same for all games.

@mitu Thank you! Resolution gave weird results, but screensize seems to work :) For emulationstation that is.

I also managed to rotate the screen properly for the games, but they only have a very small box in the middle, the rest is black. I shall figure this out, and once I do I can finally play, haha.

@mitu Meanwhile every second posting is related to this "in da houz" images.

Well after a few days of searching files and experimenting on the pi, I think I've got this figured out.

What else could I say?