Hi, glad to join this forum. I bought two nook colors for my children, and have a couple of questions before doing something on them. I really like the way a nook color is, I mean, I want to keep it as it is. However, doing some web searches, there might be permanent changes on it and never works as it should. I wonder what those things are. Can I still keep its screen and the way it looks? Can I download or purchase books and apps via its pre-installed store? Or can I install Android market on it so I may download or purchase thousands of apps directly on it? I'm a beginner of beginners on nook color. Understand my dump questions. Thanks.