after a long period trying to find a soulution for my x60s wifi by chance i found this site and my ibm x60s wifi is working now with ubuntu .. FINALLY
* sudo bash ( Just to make it more easy )
* modprobe -r iwl3945
* Navigate to /etc/modprobe.d command ::: cd /etc/modprobe.d
* Create file named iwl3945 command ::: touch iwl3945
* Open The File command : gedit iwl3945
* Add The Following To the File
o alias wlan0 iwl3945
o options iwl3945 disable_hw_scan=1
* Save The File and exit
* modprobe iwl3945
* sudo ifconfig wlan0 up
thanks alot moustafa
http://moustafaemara.wordpress.com/2008/06/09/fixing-intel-wireless-card-3945abg-defination-in-ubuntu-804-hardy/
