My Screen goes of During Start up

[Mudiaga Otokpeya <mudicipher yahoo co uk>]

Hi Everyone,

I installed fedora core in some of my client systems
in my cafe. Which went on fine, but at some point in
time I decide to change the unprobed monitor type to a
generic crt type with 1240x746. 

Now the system cannot boot to X window environment
becuase of the wrong setting of the display. I dont
want to reinstall the OS. Is there anything I can do
to change the display setting before it boots to the X
server just like Safe Mode in Windows.

Mudiaga Otokpeya

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