Well, I use Calibre to manipulate book covers since the program is free and it is easy to do. THere might be a way to do this as you suggest, just swapping picture files, but I'm not inclined to test this. But ebook distributers such as Smashwords contain book covers that show on the Nook with no modification needed.
For question no. 3: pagination shows a single page at the bottom of the screen, but this page number may not change for 2 or 3 page turns. I suspect that the page number is related to the original pagination tied to the ebook. The Nook does Not show chapter headings.
Victor
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