it sounds like the proper kernel module is being loaded. if you are not really feeling up to learning the iwconfig syntax, there is a GUI tool called kwifimanager. you will need to run it as root to set it up. i would suggest not bothering to log on seperately instead:
as your user, while in x (at an xterm or a run prompt):
xhost 127.0.0.1
then, in an xterm, possibly the same one as before:
su -
<your root password>
export DISPLAY=":0.0"
kwifimanager 2> /tmp/err.log &