[ Thanks to Falko
Timme for this link. ]
“Step 1.
You need to have rpmforge-release package installed. You can
download it from DAG
(http://dag.wieers.com/rpm/packages/rpmforge-release/).Step 2.
yum install ipw3945d ipw3945-firmware dkms dkms-ipw3945
wpa_supplicant”