I just got my Nook Color from Amazon. I bought it in used like new condition and planned on booting the Deeperblue Honeycomb Preview to it. To my surprise, when I received the Nook today, it already had CM7 installed. Comparing it to Deeperblue's ROM, I enjoy CM7 much more. However, I would like to take a look at the stock Nook OS. Is there a simple way to switch between the two with CM7 still remaining intact?