try the following to configure your /etc/X11/XF86Config file (as root) :-
the screen will blank and, hopefully, come back, having created a file called /root/XF86Config.new . Now test this config file out by :-
Code:
XFree86 -xf86config /root/XF86Config.new
If you get the raw X screen (grey cross hatched screen with an X as a mouse coursor) then you have a working config file that just needs copying to /etx/X11/XF86Config (use the "cp" command). First cancel out of the raw X screen by Ctrl Alt BackSpace (not Del) and the do the copy. Then either reboot or type "startx" and with luck you'll have gdm or kdm to logon with.
If not, have a look in /var/log/XFree86.0.log (use "cat" or "tail" command) to see if iy gives any helpful messages.
have fun
Nerderello