To Steven F. LeBrun, Michael Franc

Michael Frank, thanks for telling me about the 'system -> administration -> add/remove' applet.  I loaded my Intel Corporation PRO/Wireless 3945ABG device driver with that applet.

'lsmod | grep iwl' now shows
iwl3945               125016  0
mac80211              164704  1 iwl3945
lib80211                5064  1 iwl3945
cfg80211               30560  2 iwl3945,mac80211

Steven, I must have removed my wlan0 entry from NetworkManager by mistake.  Only wlan1 shows in that applet at the moment.  Before I used NetworkManger so many times. trying by experimentation, to activate my wireless card, wlan0 showed up in NetworkManger.  Is there any way for me to get wlan0 back?

now 'less /etc/sysconfig/networking/devices' only shows:
drwxr-xr-x. 2 root root 4096 2009-07-27 08:42 ./
drwxr-xr-x. 4 root root 4096 2009-04-14 07:25 ../
-rw-r--r--. 1 root root  153 2009-07-27 08:47 ifcfg-eth0
-rw-r--r--. 1 root root  198 2009-07-27 08:47 ifcfg-wlan1
-rw-------. 1 root root    5 2009-07-27 08:47 keys-wlan1

And now, 'less /etc/sysconfig/network-scripts' only shows one ifcfg* file:
-rw-r--r--. 1 root root   254 2009-05-01 13:35 ifcfg-lo

In the NetworkManager, under the 'Devices' tab, when I click on the 'Edit' icon, the dialog page/General tab that appears, the checkbox item for wlan1 "Controlled by NetworkManager" was definitely deselected.

But then, When I try to actviate wlan1 in NetWorkManager, I always get an error message box, saying wlan1 cannot be activated.  The dialog message box never says why wlan1 cannot be selected.

I want to thank everyone for helping me so much with my problems, trying to activate my wireless card.  I know you put a lot of valuable time in to preparing your answers to my problems.

But I have to admit, I am getting sort of desperate!  What should I do next?  I definitely want to access my city's WiFi network.  I am going to study the fedora-network-manager list next, even if I do not hear from you guys. 

Derek Starr