Sorry let me clarify this, I'm on a rooted nookColor. The one that has an LCD screen going for $250.
For a nookColor. No there is no hardware modifications, you just need an SD Micro card and an sd micro card reader. Then you can chose from either rooting your nook or run Android 2.2 off of your SD Card.
The steps are easy and the How-to are so detailed and easy to follow.
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