AHH!!! Back in business, and I hope this helps someone out there. I'm not sure exactly why this was happening, but even though my Identity Tab was able to read files on the particular SD card I was using, it was not able to recognize the flash IMG files until I actually formatted the SD card on the Identity tablet itself. I realize this wouldn't help anyone with a non functioning tablet, but if you can't get the boot loader to come up either, maybe try some different SD cards!! I'll bet the direct procedure from the that youtube video would have worked too.
OK,... the GPS works! Now we'll see what NEW problems I've created with this upgrade! :-)