flip my x display

[Lance Grover]

I have a difficult request, but does anyone have an idea as to how I can 
flip my x display. Basically I want the X display to be upside down. The 
reason for this is I am planning on mounting an old laptop upside down and 
want the display to be right side up. I have found that I can rotate to the 
side but have not found a way or a package that will allow me to compleetly 
flip the display. 

Any help or ideas would be great.

-- 
Thanks,

Lance Grover