How to config the screen resolution?

This link explained it and provided the solution. However, it doesn't work:

https://access.redhat.com/site/solutions/40591

The first two ways didn't work. The overall problem is that:

The 'system'->'administration'->'display'->'display settings' listed all resolutions that the video card and monitor support, just like what is shown in windows 7 screen resolution list. Changing the resolution from here, it replied that:"Changed, new xorg.conf created." However, this does nothing. xorg.conf kept same.

The 'system'->'preferences'->'screen resolution' only listed part of them without the high resolution listed. Maybe this list caused the problem.

Editing xorg.conf didn't do anything but trouble. It makes X windows impossible to start. After a few reboots, screen comes back as before.

Guess maybe the "driver" didn't change, went to NVIDIA website.

Found driver from NVIDIA by running the utility called NVchooser.sh obtained from there. It suggested the right drivers: NVIDIA_kernel.src.rpm and NVIDIA_GLX.i386.rpm

However, when "rpmbuild --rebuild NVIDIA_kernel.src.rpm" it complains:
"Legacy syntax is unsupported: copyright"
"Line 15: Unknown tag: Copyright: NVIDIA Corp. 2000"

Anyone knows how to bypass this?