After creating an SD card to boot into CWM, using the files available at:
After wiping the cache, etc…
http://celticstorage.co.uk/cm10/
CWM_v6.0.1.5_emmc.zip
sgt7-10-20121124-UNOFFICIAL-acclaim
gapps-jb-20121011-signed
I have JB working on my nook tablet! 🙂