That makes the Nook boot to CWM from the SD card.
What worked for me was:
Downloaded NookHDplus-bootable-CWM-6023-for-emmc-stock-4GB-rev1.zip
Extracted the .img file
Wrote the .img file to a Sandisk 8gb Microsdhc Class 2 card & put the card in the Nook
Powered the Nook off with volume up + power & released buttons when it was off
Powered the Nook on with volume up + power & released buttons as soon as I saw the Nook boot logo, it then booted into CWM from the SD card
Flashed NookHD-HDplus-Universal-Root.zip from the SD card using CWM
Flashed NookHD-HDplus-Gapps+Extras-for-stock.zip from the SD card using CWM
Powered the Nook off with volume up + power & released buttons when it was off
Powered the Nook back on, booted into stock ROM & Google play was ready to go
Big thanks to leapinlar for this, as he has turned what was a nearly useless tablet into something perfectly useable.