At Mon, 11 Dec 2006 it looks like Andreas Rogge composed:
Hello Bill,
AFAIK you cannot boot a CDROM-image from a pendrive. However you might have a look at images/README:
"The diskboot.img file is a VFAT filesystem image that can be written to a USB pendrive or other bootable media larger than a floppy. Note that booting via USB is dependent on your BIOS supporting this. It should be written to the device using dd."
Regards, Andreas Rogge
Thanks Andreas,
What threw me off was the simplist example RedHat gave for doing this at:
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/x8664-multi-inst...
The went on to write the following under "USB pen drive":
###################################################################### 2.4.1. Alternative Boot Methods
Boot CD-ROM
If you can boot using the CD-ROM drive, you can create your own CD-ROM to boot the installation program. This may be useful, for example, if you are performing an installation over a network or from a hard drive. Refer to Section 2.4.2 Making an Installation Boot CD-ROM for further instructions.
USB pen drive
If you cannot boot from the CD-ROM drive, but you can boot using a USB device, such as a USB pen drive, the following alternative boot method is available:
To boot using a USB pen drive, use the dd command to copy the diskboot.img image file from the /images/ directory on CD-ROM 1. For example:
dd if=diskboot.img of=/dev/sda
Your BIOS must support booting from a USB device in order for this boot method to work. ######################################################################