I'm a total newbie/noob to the world of Linux. Just got recommended to use Fedora Core (kernel 2.4) and successfully managed to install. Here's my system spec:
CPU: P4 3.06Ghz
RAM: 1Gb
M/B: P4P800 Deluxe
Basically that's it and it has the 3c940 driver from 3Com on-board. Got the driver off the ASUS website but cannot install it. In the manual it says:
But my kernel source is not installed there by default so when I compile it by following the steps on the manual, no surprise, it gives me errors. What am I to do? Please tell me a detail step-by-step instructions.

Thanks in Advance

Welcome to LQ.

You can grab the latest kernel source from:
http://www.kernel.org

1) Just save the kernel to /usr/src
2) Extract it "tar -xjf nameofkernel.tar.bz2"
3) Symlink the directory "ln -s /usr/src/linux-xxxx /usr/src/linux"
4) Copy your kernel config file to "/usr/src/linux/.config"
5) cd to /usr/src/linux
6) Check for recent kernel additions "make oldconfig"
7) Follow your driver install instructions
8) Read the README file with the kernel download for further installation instructions

You may also want to read:
http://wiki.linuxquestions.org/wiki/Compiling_a_Kernel

OK I was able to follow your steps until 6, I dont have the old config file (never had kernel on my linux) so I tried both of these

make oldconfig
make config

And it came up saying

No rule to make target called config (somethin on the line of this)

What am I suppose to do?

I managed to install the driver but what am I to do afterwards? How do I add it in the Network Setting Thing on Fedora?

P.S. Anyone know where to download RPM package for Kernel 2.6?