if you open the PCx.guide file, click on [Index] and scroll down to Quitting.
i have no idea about the video modes. not sure if it does support P96 or CyberGfx.
in the Video settings you can choose between some drivers, but from what I can see,
they support max 640x480 screens.
choose one driver and click on "Information" - a descrption of the driver and modes listed.
#1) testing with version 1.1 - VGA_Direct driver supports P96/CyperGfx cards.
but i can only change mode 13 in the video driver configuration (320x200 mode)