With “exit x windows” and “restart in init 3” they most probably mean that you:
Logout of your graphical session (KDE or Gnome or whatever). Then do Ctrl-Alt-F1. You will then change to the system console. There login as root (or as you feel a purist, login with your own userid/passwd and do su -, it asks for the root password. In both cases you will see nothing when you type a password. Then do
It will bring your system into runlevel 3 where it does not use graphics.
I think from there you can follow your intsructions.
To get back to normal after you installed the driver, an
could be enough, but a
may be better. Or follow the instructions you have.
Did you try all suggestions on this page? I personally do the repository way since this also enables automatic updating of the driver if you switch kernel. Providing the right modules are actually there
You may need to have kernel-sources and kernel-desktop-devel (Assuming you’re running kernel-desktop) installed for the kernel version. Check this before you begin by starting Yast > Software Management, and enter kernel in the search box. If they are not installed click the appropriate boxes and click Accept.
Then log out of your desktop and install the driver.