Thanks, Inksaver, for an excellent tutorial, the best I've seen. Few have the ability to write -leaving nothing out- in a way that noobs can follow.
Anyway, I tried out a couple of other "methods" I found on other forums, and couldn't get past the "permission denied" problem(s).
I encountered only a couple of problems using your instructions, but found clues after reading the forum replies:
1) After the reboot following running RunMe.bat, my kindle was extremely slow and wouldn't even finish drawing the screens, just as Delusionalhelp described in post #27. After reading his post, I ran the RunMe.bat again and rebooted again, and voila, it came up working like a charm.
2) Also I found that I couldn't reach the google server to log in, again just as Delusionalhelp described in post #28. After a half dozen tries, I finally logged in successfully, and then proceeded with installation of google play.
I also got rid of the lock screen ads, and (hopefully) prevented automatic OTA (over-the-air) Kindle firmware updates by installing and using DroidWall's blacklist. Time will tell.
Kindle Fire HD 7' version 7.2.3 out of the box.
Registered just to say thanks.