First of all, I'm a newb myself, so handle my information with care =) I installed my wireless card like this: 1. Installed the latest MadWifi drives, http://snapshots.madwifi.org/madwifi-ng-current.tar.gz
(2. I had to reboot here)
3. Created a file with the following contents:
wlanconfig ath0 create wlandev wifi0 wlanmode sta
ifconfig ath0 up
iwconfig ath0 key YOUR_WIRELESS_PASSWORD
iwconfig ath0 essid THE_NAME_OF_YOU_WLAN
which I placed in my /root/.kde/Autostart directory.
You have to have a kernel that was compiled with the Cryptographic option enabled.
For more info on MadWifi check out http://madwifi.org/wiki/UserDocs/GettingMadwifi