[CentOS] Wireless networking in CentOS 4.4

Trying to set up wireless networking with CentOS 4.4 on a (new Dell)
laptop and have looked at http://www.ces.clemson.edu/linux/fc2-
ipw2200.shtml
and http://www.centos.org/modules/newbb/viewtopic.php?
topic_id=2532&forum=30
regarding use of ipw2200, which is included in the kernel. The problem
is that it doesn't appear to be actually installed/loaded because the
Intel Corporation PRO/Wireless 2200BG driver doesn't appear in the drop-
down list under Devices > New > Wireless Connection in system-config-
network.
Also /sbin/lsmod | grep ipw doesn't produce anything - so I'm pretty
baffled!
Any suggestions please?

Andy