It's really easy when you know how, epecially in SuSE.
1. Make sure you have the kernel-source installed, you can type rpm -q kernel-source in the console to see if you have. If not you can see what kernel version you have by looking in the control center or YaST and typing kernel in the search.
If you have not got the kernel source you cannot install the nvidia driver, tell me what kernel version you have and I will provide the link to download it. SuSE 9 Pro comes with the kernel-source and all packages you need, it's rather easy and no need to reboot.
AthlonXP 2600+ / nForce2 Asus A7N8X-X / PNY GeForce FX5900 Ultra / 1024Mb Samsung Ram /nForce Sound / Hansol 920D Plus 19" monitor / Lite-On 32x12x40 / 2x Maxtor HD 40Gb/80Gb / nVidia 7174 driver / Gnome 2.10.1 / Kernel 22.214.171.124 / Slackware 10.0