You need to use ndiswrapper, which may or may not be installed on your system.
You can check this by running:
If you see "no ndiswrapper found in: " and then a list of directories - then you do not have it.
If you see something like /usr/bin/ndiswrapper - then it is installed.
Assuming it is installed, here is what you do with it.
ndiswrapper is a utility that allows you to run any .inf device driver that employs NDIS (windows network drivers) in Linux. So, you will need to put your CD in your drive, because we are using the Windows driver.
Once you have the CD in the drive, and you have mounted it, go into the directory, and in one of the folders, find the .inf file. cp this file to your home directory, or wherever you want to keep it.
Once you have done that, make sure your device is plugged in, and do the following:
ndiswrapper -i (your inf file)
At this point, you should see your driver listed. If not, there is a problem. Try it again. If you do see it listed, then do the following:
You should now be up and running, and you can use iwconfig to check signal, and ifconfig to assign IP's.