You have no takers in almost 24 hours. So, in the absence of a reply from "those with many posts", I just will tell how I got my Linksys WMP54G going in FC2. It worked very well. I am still using the device today, but not with Linux. Anyway, I hope this will help in some way. If one of the experts comes in here and runs me off, I will humbly retreat.
I used an NDIS wrapper to install and use the Linksys Windows drivers in Linux. It is called ndiswrapper. I had to find it, download it, untar it, compile it, learn about it. Google will get you there.
I also used a DHCP client software package. I used dhcpcd but dhclient seems popular these days and will be installed with FC5. It seems to do the same thing (get an IP address, etc. from a host server). I have never used dhclient. You should research dhcpcd v. dhclient.
These are the exact steps that I took from my notes. Some of the details will surely need to be customized for your hardware. This worked for me. It may not work for you. It may be outdated for today's packages, and I cannot vouch for its applicability in the FC5 environment. Anyway, here goes:
1. Compile and install ndiswrapper and dhcpcd (or dhclient?)
2. Install the Linksys Windows driver from the Linksys CD using ndiswrapper:
ndiswrapper -i /mnt/cdrom/Drivers/bcmwl5.inf
3. Confirm the status of the installed drivers:
4. Load the ndiswrapper module:
5. Verify the driver is loaded and active:
6. Configure the wireless interface using iwconfig (encryption key, essid, etc.):
iwconfig wlan0 key restricted [WEP key here]
iwconfig wlan0 essid "router SSID here" (including the quotes)
7. Create the alias “ndiswrapper” for “wlan0” in the modprobe.conf file
8. Activate the the wireless interface using ifconfig
9. Run dhcpcd
At this point, I would then be online. I wrote a Perl script to automate the everyday startup steps (steps 4-7). If the FC kernel was updated, I had to recompile ndiswrapper.
I sincerely wanted to help. I hope I did. I am willing to elaborate as required. Since I am not currently doing any of this, I cannot help much with troubleshooting. But I will try if the experts never show up.