Software:

IMPORTANT:

You need to update the original BIOS for the PCI stuff to work properly.

Get the newbios (or newbiosm if using on-board IDE) from d1v3rs1ty's web page and re-flash your BIOS if you haven't done it already.

Download the Ethernet drivers from Intel here

Download the EEPROM configuration files from here - (interesting footnote)

Unzip them onto a local directory on your Websurfer disk. (I suggest Driver and Eeprom as two good names)

Boot your Websurfer into DOS (command mode = F8 + whatever selection it gives you). (*not* into a DOS box!)

In your Eeprom directory create a text file MAC.DAT that just has you MAC address as a six byte hex number on one line

e.g:  000000000000

Hint:
Don't use the zero's above! Grab an old Ethernet card (that you won't ever use again!) and hijack the MAC address from that.
They are usually on a small label on the card  itself.
Don't set the top byte as odd. There are some bad no-no's with doing that.

(The top three bytes are usually manufacturers ID numbers with the lower three bytes set as sequential numbers)

type the following
 

eeupdate 82558.eep mac.dat

which will set the MAC address in the EEPROM and configure the other parameters it needs too.
You should find it takes a few seconds and then prints something like "EEPROM Sucessfully written"

You can now reboot the Websurfer and Windows will find new hardware and ask you for the Intel PRO/100+ driver disk (which you have in the Driver directory).

A couple of reboots later and you should be up and running after you've configured the Networking stuff with you IP address etc.