Screen Resolution problem for login screen

Hello,
I'm just wondering how i would change my default screen resolution for the login screen. I just downloaded the restricted driver for my computer. Its working fine except for the login screen. The screen resolution is too high for my moniter to support it. I want to set it on 1280 x 1024. I have been researching online how to change it. After i been researching online, i starting to know i have to change the xorg file on my computer. But when i look at it, I cant find how to change the screen resolution. Here is my xorg...

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
 Identifier "Default Layout"
 Screen 0 "aticonfig-Screen[0]" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
 Load "glx"
EndSection

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc105"
 Option "XkbLayout" "us"
EndSection

Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "CorePointer"
EndSection

Section "Monitor"
 Identifier "aticonfig-Monitor[0]"
 Option "VendorName" "ATI Proprietary Driver"
 Option "ModelName" "Generic Autodetecting Monitor"
 Option "DPMS" "true"
EndSection

Section "Device"
 Identifier "aticonfig-Device[0]"
 Driver "fglrx"
EndSection

Section "Screen"
 Identifier "aticonfig-Screen[0]"
 Device "aticonfig-Device[0]"
 Monitor "aticonfig-Monitor[0]"
 DefaultDepth 24
 SubSection "Display"
  Viewport 0 0
  Depth 24
 EndSubSection
EndSection

Anyone got a clue how to do it?