I didn't want to have to purchase a card and a USB reader just for a one-time use (I really don't plan on storing enough books on the NC to need the microSD). But I went ahead and got a reader/card bundle from Amazon for cheap, so I'll give it a go when it gets here.
I found this vid on Youtube and I think I will be able to follow the instructions. They are quite clear:
http://www.youtube.com/watch?v=MUoHALWvPts
Thanks for the replies!