First of all you need to find wether your card is already recognized by the system. Open up a console and type ifconfig. If on the left you have one which something like wlan0. your set to go otherwise you need to find out wether the card is natively supported. First of navigate to /usr/src/linux. type 'make menuconfig' and then in the menu Go to Device Drivers->Networking->Wireless and make sure you support for wireless devices. If you can see the device their select it. Save the configuration and then type 'make && make modules_install' followed by 'make install'. Then a simple reboot will give you your wireless device. If not then look at intel website for a native linux driver. Failing that you need to look at ndiswrapper at www.ndiswrapper.org
Once you have your wireless device. It then has to be configured. You can use wireless-tools or wpa-supplicant. The difference between them is wpa-supplicant is more secure with support for WPA and WEP. I personally use wireless-tools as its easier to setup and the network im on is a home network so security isn't a issue. Assuming you to choose wireless-tools and have it installed. Check for your access point using iwlist wlan0 scan. If its there congratulations your nearly there!. You can then connect to the access point by typing iwconfig wlan0 essid "<your-access-point-here>". Type iwconfig wlan0 and you should see it connected to the access point. Finally the connection needs a ip address. This can be accessed statically through ifconfig or dynamically through a dhcp client like dhcpcd.
Once youve done this you probably want it to start at boot. Under my distribution this is done by editing /etc/conf.d/net. Fedora may be similar but if not you could always look at the help instructions for Fedora