A search for Irongeek's tutorial on using BartPE's Builder to make an anti-spyware and rescue CD brought up this:
http://www.antionline.com/tutorials/...&IC_QueryText=

Link goes to Smoothwall Express 2.0 Firewall for Beginners – Part One

Irongeek's tut can be found here:
http://www.antionline.com/showthread...hreadid=266178