These are the steps I followed to install DWL-G122 on Fedora Core 3
1) Go to
http://rt2x00.serialmonkey.com/rt2570-cvs-daily.tar.gz and download tar file.
2) make sure you are root.
3) in a terminal tar -zxvf rt2570-cvs-daily.tar.gz
4) change directories to rt2570-cvs-_______/Module
5) make
6) make install
7)/sbin/modprobe rt2570
8) Go to System Settings
9) Then choose Network
10) (IF Prompted) input roots password
11) Click New
12) Then Choose Wireless Connection
13) Then hit foward
14) select rt2570(rausb0)
15) Enter your configuration settings on both screens
16) Hit apply
17) Then double click on device rausb and check activate device when computer starts.
Hope this helps. After Hours of frustration I can say it is now honestly worth it. I was worried I would have to go back to the dreaded Windows XP.