OK...
Administration Center ("PCLinuxOS Control Center" when the window opens) ---> Wireless Connection
In the configure window: "managed", SSID, and WEP key
After configuring, the circle with the curved arrow means it is not connected. Click "connect" and it should change to the cute little icon of two computers that look like they are having and intimate chat or ......
As I said earlier, I've never used Ad-hoc, and I'm not sure what it does.