geforce2: yast2 or nvidia?

Hi . sorry i lost my notes and cant remember how to do this. I know there was a problem simply using yast2 to enable 3d. last time i was met with a blank screen and frozen system. The drivers are installed. should i update them and then manually edit xf86config? its a geforce2 64 ti on a viewsonic monitor, but i have vesa generic as it runs well this way. i think my earlier problem was in selecting viewsonic and then manually entering horiz. and vert. freq. I now have vesa gen. with the proper config. im hesitant to enable 3d as i dont want a unbootable system. thanks in advance.