CDU PSONE VGA

Hi to every one... i have been working hard trying to make work a psone
screen under vga mode in one of my computers... and finally i managed. my
surprise came when i tryed to run the CDU in full screen mode in this screen...
everything appeared black (actually nothing appeared)... the i decided to
use the frame to see what happened... the frame was nicely there, but not the
green menu inside the frame... so i decided it had to do with the
resolution needed to make the psone work in vga mode (256 colours). i tried with
another screen this time with coposite video signal...and same thing happend.
So CDU does not work with resolutions of 256 coulours, appenatly)
so the question here is: did anyone make a psone screen (NTSC system) run
with the full screen of the CDU? using a VGA cable... and if positive could
you explain how... i am really lost now

thanks in advance

enrique

i managed finally, the secret is force to 256 in windows right clicking on
the cdu icon and making the change in compatibiity... psone+vgs+PM CDU+FDS
CDU= A M A Z I N G thing!!!, thanks

enrique