How can I set the screen refresh rate for a CRT VGA monitor in Leopard? I need to operate a CRT monitor in 100 Hz (1280 x 1024) on a Leopard Machine.
The same monitor was working fine on a Tiger machine in the mentioned range but I switched to Leopard and it does not show the 100 Hz option in the list any more (but I am sure the monitor can support it). 
Is there a way to manually modify the list?
This handy utility SwitchResX can give you the option to adjust your monitor settings.

There is also this utility (which I haven't tried/tested)