right click on my computer, go to properties, go to hardware, then device manager.
under network adapters, right click on the wireless card, then click update driver
if you have the CD, you can keep it on "install the software automatically" and it will (or at least should) search the CD for the right drivers
if not, then click on Install from a specific location
then click on Don't search, I will choose the driver to install
then browse around the CD.
it should have a Drivers folder somewhere, and in that folder, different folders for different OS's. go to the folder for your OS and select the .inf file that is in that folder