Additional shader support?

[WWWFWWW]

Seems there are 19 different included shaders in the Boxer.app folder, including some nice ones, yet the GUI only allows choosing between original, smoothed and TV scan-line effect.

Is there any option to use any of the other shaders via config?

tried adding [render] scaler=xBRZ Multipass Freescale (plus adding forced to the end as well) section in the game.boxer's dosbox config, yet that did nothing.

Thanks!