Sorry, overlooked it
Anyway, the best way to dump the NAND is the method with BootMii. It's very simple

->
http://forums.dolphin-emu.org/showthread.php?tid=162
You just have to boot the Hackmii Installer through LetterBomb/Wilbrand and after that, install BootMii. Then, follow the guide.
I know that there is something wrong with YAWND (one that runs out of homebrew, not BootMii). It gets a small amount of the dump done, then has a tantrum and deletes the dump, and gives up.
Yeah, I had a lot of problems with YAWND, but the BootMii built-in one worked fine with only 1 bad block.