PRE-INSTALL

    Kernel sources must exist in /lib/modules/[version]/build

POST-INSTALL

    Run depmod -a, edit /etc/modprobe.conf and /etc/rc.d/net.  The module 
    name is ath_hal or ath_pci, depending on your card.  The wireless 
    ifdevice name is ath0.  Something like this should work:

    /etc/modprobe.conf:
    alias ath0 ath_pci

    /etc/rc.d/net:
    iwconfig ath0 essid myid
    iwconfig ath0 key mykey
    dhcpcd ath0