Install the Nvidia repo with the following command, as root:
Then open up yast/software/software management, in the show tab select archives or if it is repos in the english version. Now select Downloader and installer for the nVi... . dkms will be preselected, if you're on 64-bit select dkms-nvidia, nvidia-compute and x11-video-nvidia, if you're on 32-bit select the corresponding 32-bit packages. Click on accept and you should be done with thw Nvidia stuff.
zypper ar -r http://download.opensuse.org/repositories/home:/Bumblebee-Project:/nVidia:/latest/openSUSE_12.2/home:Bumblebee-Project:nVidia:latest.repo
Now proceed with Bumblebee, start with adding the repo:
In yast follow the same procedure as for the Nvidia stuff, except now you select the Bumblebee repo. For 64-bit VirtualGL, bumblebee, dkms-bbswitch, libturbojpeg and profile-sync-daemon, for 32-bit you guess it.
zypper ar -r http://download.opensuse.org/repositories/home:/Overman79/openSUSE_12.2/home:Overman79.repo
Proceed with rest of the instructions.