grey'd out? You are not doing it right. You just config the button with the second controller instead of the first. for the first controller you should see p1_... when you press a button and controller two as p2_...
So you would do this.
config -> gamepad -> port one -> pad one [ set up all buttons and make sure they say p1_... and so one ]
then
config -> gamepad -> port two -> pad one[ set up all buttons and make sure they say p2_... and so one ]
remember there are 2 ports on a psx and each port has a pad and memcard. Dont confuse pads and ports
