Ok, the modeline below is caluclated from the online link in my previous post. If you copy and paste it into your
/etc/X11/xorg.conf and comment out other lines with a # this should work.

Make sure that your graphics card and monitor can run at 75KHz, the refresh rate is 70Hz


Modeline "1280x1024@70" 141.82 1280 1312 1848 1880 1024 1044 1056 1076

Horizontal sync frequency: 75.43 kHz