Caveat: This is a statement of my experience in attempting to build and use a rescue disk, it is not a complaint to anybody about anybody or anything. In posting this I am hopeful to receive some pointers on where next, and if the question and answer help someone else having a similar experience down the road, all the better.
I was able, following the instructions provided, to build what the PE Build Version 3.1.10a declared a successful ISO image. I burned the related ISO to a CD and set the BIOS on the affected PC to look to the CD first. It booted and started using that disk but halted at a window (screen shot referenced below) I wasn't prepared for asking for something I did not have and think I may not be able to get.
Also available as a PDF at http://members.cox.net/dwpenn/disk_needed.pdf
Any suggestions on how to resolve this would be most welcome. Thanks, Dean