once you install the SD card the Nook will create a few folders on it automatically for you... one such folder is called :My Documents..... this is where you will want to put your books once you've edited it to how you want. ... using a program like Calibre which is good for ebooks and the Nook simple touch, you'll want to go to your SD card then My Files, then Books and move them over to the My Documents folder.... when you are done, unplug your nook from you computer/laptop and it should start to refresh itself with the changes and show your books in the "Library" view.
if you have more questions just let me know and i'll help ya
