Good grief. I have a working Kindle!
It was very simple to do once I had Yifanlu's fastboot and followed instructions in the "simple kindle touch debricking method" thread.
FYI. I did this all using OSX with a virtual Windows XP machine in VirtualBox for the MfgTool.exe. One thing I found useful was to put the Kindle into diags mode using the XP machine. Then you can unplug and plug the Kindle into whatever machine you want and it will stay in diags mode. THEN, when you have it in the machine that you want it, put it into fastboot mode using the Kindle diag options D then F.
Also, instead of "sudo ifconfig usb0 192.168.15.201" I had to do "sudo ifconfig en8 192.168.15.201". I found this, and generally checked on the status of the mounted Kindle, in the "->About This Mac->More Info...->System Report" page.
Thanks to all, especially to geekmaster for your help. I feel like I may even have learnt something on this little journey ;-)