I did this a couple of years ago on a different Nook but the procedure in the wiki doesn't seem familiar, so I assume something must have changed.
Any help for this dumb old guy would be greatly appreciated!
p.s. - yes, it's a Nook Color, and it shows 1.4."something" for the device before I started. In scanning the net I now have seen references to updating the firmware prior to trying all of this. I tried that when I first powered it on prior to starting this but nothing showed anywhere for an update.
P.S.S. It does power back up as a "regular" Nook Color if I hold the volume up button and the power button for about 16 seconds or so, but the wiki procedure still doesn't appear to be working even with re-imaging the MicroSD card again.