Configuring a Windows XP Client - more
Finish the wizard, and view the wireless networks by double-clicking on the wireless network icon in the taskbar. Select the your network and click on "Change Advanced Settings".
Figure 7: Wireless Networks
On the "Wireless Networks" tab, click "Add" under Preferred Networks.
Figure 7: Advanced Configuration
Enter the SSID of your router and change the Network Authentication to WPA2.
Figure 8: WPA2 Configuration
On the "Authentication" tab, click Properties under EAP Type.
Figure 9: EAP Configuration
Select your CA from the list, and check "Use a different username for this connection".
Figure 10: Certificate Selection
Hit OK to finish. Open up the wireless networks again and connect to your newly secured network.