If you booted your linux box the kernel is installed correctly. I think the kernel image is in /boot directory. For RedHat 8.0 the kernel source is in /usr/src/linux2.4.18 *something like that*.
As for your wireless tools... are you using a laptop? If so, Red Hat probably installed it when you installed your networking packages. I forgot the command to see a list of loaded modules. I think it's lsmod
Or... run /sbin/iwfconfig . If that comes up with anything other than command-not-found the wireless tools are installed.
Sorry if that doesn't help much.