[SLL] X server set up Wrong Horizontal ViewSonic VA720

[Chuck Kranz]

Hello all,
I've been setting up a Fedora 7 64 bit box with a ViewSonic VA720 
monitor. I used the system-config-display and made the mistake of 
changing from the generic 1280 X 1024 to the actual ViewSonic display.
It now is stuck with a horizontal speed that is out of range for the 
monitor(90Hz). Does anyone know how to clear this out so I can start 
again with system-config-display? Or better yet, has anyone got this to 
work?
Thanks,
Chuck