In my case I had a (Drivers and Utilities) CD that I also had to install after the OS. Open it after downloading . Automatically it detects System Model "Latitude 610" and OS "Windows XP" then it lists all devices by drivers i.e. Audio Drivers; you require Network Drivers..
Select the US based "Dell_Wireless(US) WLAN Network Adaptor Card Rev:A04.
You would need to extract the compressed file.
Once again you have an automatic response from an InstallShield Wizard which installs and immediately notifies you of avail. networks (and wireless at that)