Kibbs, I don't think there is a reason you should be recompiling the kernel with SUSE 9.2. I have the driver working with my 5700 Ultra without doing that. Maybe you mean compiling a kernel interface...
First, if I remember correctly sax2 will not display the name of the card, it will instead show a number (my FX 5700 Ultra is 0x0341). Check the nVidia readme for details:
Second, you can ignore the Rivafb message as long are you are not loading that module. (lsmod will tell you what modules are running)