No, sorry, I meant to ask what the purpose of sax was. Like, is it a configurator tool? Or SuSE's version of the startx script? Or something else?
i386 is the least common denominator among all the Intel-compatible (this includes AMD and Via/Cyrix) processors that can run Linux. It was also the first. So I think that's why yast says you have i386.
Have you tried the NVchooser.sh script?
sh NVchooser.sh from inside the directory you download it to.