Rooting Nook Simple Touch

Hello, I just purchased a Nook Simple Touch and I'm looking to find a decent guide for rooting and installing Android onto it. I have found a few guides, but a lot of them seem out-dated and no longer relevant. I would like to be able to play Gameboy emulators on it, like in this video:

http://www.youtube.com/watch?v=XQJGfU8fEUg

Any links, tips or thoughts would be helpful. Thank you!