Cobbled together an xorg.conf for both my laptop (1280x800) and desktop (1280x1024) and thought I'd share it. Below is what I'm using now on the laptop. Just comment the 1280x800 lines and uncomment the 1280x1024 lines to get the other resolution. Xorg -configure gets a close resolution (1280x720) but not quite there. So needed to edit it some to get what I wanted.
Code:
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/local/lib/xorg/modules"
FontPath "/usr/local/lib/X11/fonts/misc/"
FontPath "/usr/local/lib/X11/fonts/TTF/"
FontPath "/usr/local/lib/X11/fonts/OTF"
FontPath "/usr/local/lib/X11/fonts/Type1/"
FontPath "/usr/local/lib/X11/fonts/100dpi/"
FontPath "/usr/local/lib/X11/fonts/75dpi/"
EndSection
Section "Module"
Load "dbe"
Load "dri"
Load "dri2"
Load "extmod"
Load "glx"
Load "record"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/sysmouse"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 1-10000
VertRefresh 1-10000
#Modeline "1280x1024" 102.24 1280 1296 1552 1736 1024 1024 1033 1070
Modeline "1280x800" 83.5 1280 1352 1480 1680 800 803 809 831 -hsync +vsync
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "ShadowFB" # [<bool>]
#Option "DefaultRefresh" # [<bool>]
#Option "ModeSetClearScreen" # [<bool>]
Identifier "Card0"
Driver "vesa"
VendorName "VMware"
BoardName "SVGA II Adapter"
BusID "PCI:0:15:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
#Modes "1280x1024"
Modes "1280x800"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
#Modes "1280x1024"
Modes "1280x800"
EndSubSection
EndSection