For the LiveCD, you might want to run something like
modprobe -l | grep ath
When I last checked, the L.F.S. LiveCD was rather old, and the Atheros 9k drivers might be too recent for it. You might should try installing it from another distribution, or downloading the files on another computer, or in another distribution, and copy them to your L.F.S. partition. I hope that this helps.
Here is what you need to do to configure it in your own kernel:
cd [your kernel directory]
Then, go to Device drivers > Network device support > Wireless L.A.N. > Atheros wireless cards. Set 'Atheros 802.11n wireless cards support' to Y or M. Alternately, add this to your .config file:
(you might need to enable a few other things to make it work.