Post XF86Config or xorg.conf. These files can be found in /etc/X11.
You can try to add Option "IgnoreEDID" in the driver section. This will force the X Window System to use the modeline that you specify without detecting the min and max ratings of the monitor. Option "NoDDC" is the same as Option "IgnoreEDID". Adding Option "ConnectedMonitor" will also help too. You can also add Option "IgnoreDisplayDevices".
Read the README.txt that comes with nVidia drivers. In runlevel 3, run X Window System by doing "startx -- -logverbose 5" and check the logs in /var/log. Use
http://xtiming.sourceforge.net/cgi-bin/xtiming.pl to help you make the modelines without using a calculator.
I never had problems installing nVidia modules (drivers) in Mandrake and Slackware. Soon I need to install them in Gentoo.
I do not have this display because it is too dam expensive. I go for Dell's 20 inch LCD monitor because it is better than Apple's display and it supports several resolutions.