X in CentOS/RHEL 5 on a MacBook

# Xorg configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "vesa"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "MonitorVendor"
ModelName "MonitorModel"
Horizsync 28-50
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Virtual 1280 800
Modes "1280x800"
Depth 24
EndSubSection
EndSection