monitor offset

[mansour77 at yahoo.com]

Hello every one:
I having a little problem and I need an expert to help.
I have 2 PC's running windows and Linux (Fedora 6). I use a KVM to 
switch back and forth. I can adjust the screen position to suit one of 
the PCs, but when I switch to the another one, I found an off set close 
to an inch. I find it very inconvenient to  keep  on adjusting my 
monitor for the PC I am working on. Therefore I decided to play a bit 
with Xorg and shift the coordinates of the display on Linux, since 
Windows will never let me do this. Unfortunately, no luck.
I tried changing the parameters to the screen section in the 
serverLayout, then I tried to change the viewport, but nothing worked. 
Here's what I did:


Section "Screen"
       Identifier "Screen0"
       Device     "Videocard0"
       Monitor    "Monitor0"
       DefaultDepth     24
       SubSection "Display"
               Viewport   120 0
               Depth     24
               Modes    "1400x1050" "1280x1024" "1280x960" "1280x800" 
"1152x864" "1024x768" "800x600" "640x480"
       EndSubSection
EndSection

#########################################
then I did this:


Section "ServerLayout"
       Identifier     "single head configuration"
       Screen      0  "Screen0" absolute 120 0
       InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

###########################

nothing worked.
Any idea ?