|Perhaps you would care to revise your guide.|
I might if I thought it necessary but it really isn't.
In a small home environment with a SOHO Router doing the DHCP, each PC will get the same IP every time it's renewed. In fact, even in a larger scale DHCP server, the default is to always lease the same IP to the same MAC address.
This is true for many highspeed clients. For instance, my ADSL, I get the same IP every time the lease is renewed unless I change hardware. I used to have a 2wire combination unit from my provider that was the modem/router and an AP all in one. It started to screw up (wireless wasn't working properly) so I asked them to send me a new modem. A modem only, and bought a reliable SOHO Router. Before shutting down the 2wire, I made note of it's external MAC and spoofed that on my replacement router and when I fired it up, I had the same external IP I've had for years. Had I left the external MAC on the replacement router what it was when I bought it, I would have received a different IP address. Since I regularly remote into my home network, I like keeping the IP the same ergo my spoofing the MAC.
If you're curious at home, open a command prompt window on your PC/laptop and do the following commands in order (waiting for them to finish):
The first command releases your TCP/IP settings and the second is a DHCP request for TCP/IP settings. Do it as many times as you like. I wager you'll get the same IP every time.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.