Getting the nVidia drivers working at 100% on Linux can be a big effort. But by trial and error I got there at the end. I suggest you get X Windows working first. Backup your XF86Config before each major change you make so you can go back.
Suse 9.0 comes with SaX2 - that program can get you a working starting point. That may do something, but it probably won't do OpenGL fast. You may find SaX2 has given you a config that uses the "vesa" or "nv" Driver - which is OK for 2D. After either of those is working use the downloaded nVidia drivers and go for Driver "nvidia".