using the instructions given in in Nvidia website i downloaded a .run file and using sh command tried to install it,but i'm given this error :
ERROR:
The kernel header file '/lib/modules/2.6.18.2-34-default/build/include/linux/version.h' does not exist.The most likely reason for this is that the kernel source files in '/lib/modules/2.6.18.2-34-default/build' have not been configured.

what actions should i take?

be sure the kernel headers (source) are installed as well as make and gcc then you should have no problems installing from runlevel 3 (no X server running)

kernel sources are installed along with gcc,and i did switch to init 3 before running the installation file,any ideas?

Have you checked http://en.opensuse.org/NVIDIA to see any information on that page might help?

Which version of openSUSE are you running?

What are the results of the command: uname -a

Did you run the .run file as root?

Edit: Ok, forget the first question, I see your sig now. The error message you got is usually one you get when you don't have kernel sources installed.

since I don't have internet connection on linux for now i can't take advantage of online driver download(which i used to consider when i had internet connection on linux)
finally i found out what to do to get the drivers compiled correctly, Nvidia installer uses the kernel files installed in /lib/modules/
and some unconfigured kernel sources where there by default so driver installation failed,I tried to reconfigure the kernel in /usr/src with make command and using directory switch pointing my new configuration to /lib/modules where Nvidia installer uses
for more info look at README file for make of kernel-sources directory,thank you for all suggestions