I have recently installed FC5 on my dell xps 400 I am using an WMP54Gv4
card I dl the newest kernel and kernel-devel and I installed ndiswrapper everything went smooth installed the driver for my card and shows driver installed and hardware present. lspci even shows my hardware then I modprobe ndiswrapper I get the shell back and then I try to set my wireless key and get the following error wlan0 no such device. everything seems to be installed correctly why do I not have the wlan0 interface?

Fedora Core 5 is a bit differnet, you need to create an addon modules file in /etc/sysconfig/modules, which is the command to load ndiswapper.

Example (for my broadcom 4318 built-in wireless and winmodem);

-rwxr-xr-x 1 root root 44 Apr 16 16:05 4318.modules

and the contents;

modprobe ndiswrapper
modprobe snd-intel8x0m

You also need to have/create a /etc/sysconfig/network-scripts/ifcfg-wlan0 script file, for example;

IPV6INIT=no
ONBOOT=yes
USERCTL=yes
PEERDNS=yes
TYPE=Wireless
DEVICE=wlan0
HWADDR=
BOOTPROTO=dhcp
NETMASK=
DHCP_HOSTNAME=My_Computer_Name_Here
IPADDR=
DOMAIN=
ESSID=
CHANNEL=1
MODE=Auto
RATE=Auto