tweaking desktop.... xvidtune?

Hello there
 
 
I have a linux box that also runs windows 98. So here's the problem, if
I boot in windows my desktop is configured (by the physical monitor
settings) to take up as much space on the monitor as possible. Then,
when I go to linux on the same box (with the same monitor) my desktop is
slight shifted over to the right such that part of my desktop is cut
off. 
 
I can solve this problem by physically adjusting my monitor settings
again, but I have to do this every time I boot from one os to the other.
I know that you can change this in freebsd by running the 'xvidtune"
command and editing your /etc/X11/XFConfig file. But I tried this in
redhat 9.0 and got no love. instead it couldn't even run the Xserver.
 
I found someone else who had a similar problem, but I don't think that
anyone proposed a solution to this? One person recommended using
Xconfigurator, but this doesn't help me adjust the screen to shift to
the left.
 
Thanks in advance.
 
 
Regards
 
Desmond