If you want to launch the HBL from emuNAND, then yes, you can install a Cubic Ninja cia and use Ninjhax with that.I have to wonder, I am now on emuNAND 10.3.
How do I get homebrew in? Does Ninjhax works? As I ca simply install cubic ninja.
Also, is it true that is possible to instal an earlier version of the DS flashcard blacklist? Mine got blocked at 6.x
Yes you can install an earlier version of the DS whitelist. Search for "flashcardtimewarp" on "some iso site."