Try xf86config.  It is a pain because it isn't a really smart program, 
but you should be able to make the change.

Don Theune wrote:

> Hi folks,
> 
> I've installed Red Hat on one of my machines.  X is not starting because 
> I've set my
> video card's refresh rate too high.  I don't have a copy of XF86Setup.
> 
> Will someone either tell me where I can download XF86Setup or email it 
> to me as
> an attachment?
> 
> Thanks in advance,
> 
> Don
> 
> 
> 
> 
>