Caveat: While the installation program correctly detected my frequency range, it picked the highest vertical frequency that it supported, which was not actually the optimum vertical frequency for my monitor's display. I had to manually alter the frequency setting. Some monitors actually only support one vertical frequency. LCD monitors are like little computers of their own, and my experience has been that they don't burn out like a CRT will if driven at the wrong frequency; they just won't display.
I forgot to include this very useful website for finding the settings for manual monitor modes for xorg or XFree86.
http://www.hut.fi/Misc/Electronics/faq/vga2rgb/calc.html
Peace, William