There is supposed to be a file called:
NVIDIA X Server Settings
Though I must admit that I did not use the Yast method for the NVIDIA driver (due to a kernel update and following incompatible driver).
Hence I am not sure if the:
NVIDIA X Server Settings is part of that install.
Anyway you get the latest driver version in you install:
NVIDIA-Linux-x86_64-1.0-9631-pkg2.run. Download it from
www.nvidia.com open a shell go to runlevel 3 cd to where the
NVIDIA-Linux-x86_64-1.0-9631-pkg2.run driver is and
sudo sh NVIDIA-Linux-x86_64-1.0-9631-pkg2.run.
Its painless and takes les than a minute.
Change back to runlevel 6 and you should now have the
NVIDIA X Server Settings option from the SuSE menu.
But see if you can do what you want by running SaX2 first from a shell.