Where did anything state it works on Nooks? (Heck, according to Wikipedia, even the Blackberry version was removed by RIM).
If you obtained it from someplace other than the Nook shop (which implies you had to use ADB to sideload it) you are on your own with regards to activating it. As for getting it into the Nook shop, you have to ask the makers to submit it to B&N, not the other way around.
You have to go to Settings and enable ADB.
Then transfer via ADB. How did you install it?