You may well find that you don't need ndiswrapper to run this card, but you are going to need to experiment to find out if this is so.
Out of the box, fedora8 installs the open source drivers that work with most atheros cards and if your first quote is true for your situation pre-ndiswrapper then I would try firstly to uninstall ndiswrapper as the two methods of controlling the card can cause conflicts.
If you card is being recognised after the uninstall then first thing to try is to see if NetworkManager will control it for you.
If you have installed from DVD and are running Gnome then there should be an icon top right on the toolbar that if you left click on it will present you with a list of wireless networks. Left clicking on one of those will walk you through the steps of connecting.
If you have KDE then KNetworkManager off the Main and then System menus wiil start that program. Note that it's a bit shy and sometimes needs a restart of the desktop or even a reboot before it will appear in the KDE system tray.
If you installed from a live CD then you will need to run the Services control module:
is one way to start it and ensure that the NetworkManager service is marked to start and is actually started. It usually isn't from a livecd install.
If you have explored in:
and set the card to "Activate on boot" then that designation must be removed and NetworkManager left to manage the whole process. It usually won't control the card if it sees the card has been marked for starting at boot.
Hope it works for you, getting wireless networking controlled is either incredibly easy in fedora8 or nearly impossible.