Ok, well Opensuse does not have the Nvidia drivers in there official repository.
Before you add it i recomend you have everything up to date.
Firstly, if this is a new install; Opensuse installs only parts of meta packages from the dvd. eg if you are running kde, right click desktop, go to desktop settings and you will notice you have only two wallpapers. Once you connect to a network, open Yast, go into software management and once the repos are refreshed, just click accept, and let it install the rest of the meta packages. After it's done i recommend a reboot.
Once you're systems running again, open a terminal and run the following command.
This is to update. In Opensuse after a update, to restart all the programs and services i just do a reboot, i think it's easier, so reboot once the updates are done. If there was updates, after the reboot, i always open up the terminal and do a 'sudo zypper up' again, just to make sure it got them all (It doesn't always for some reason), and repeat until there's no more updates.
Here's how to install the Nvidia driver.
Go to 'Software Repositories'.
At the bottom, select, 'add'.
Now you've a bunch of different options on how you want to add a repo. Select 'Community Repositories' and then click next.
You will now see the most popular repos made available with the Openbuild service. You want to tick the nVidia Graphics Driver repo and click add.
Once this has been done, while still in Yast, open 'Software management'. In the search bar type 'Nvidia' you will notice some packages are already ticked and about to be installed, that is because Opensuse as detected your graphics card and auto selected the appropriate drivers for you. click accept and once everything is installed do a reboot. Once you're system is running again, try to access the nvidia-settings Configuration Tool again and if you get an error again, do the instructions i gave you in my first post again.