Oh well, I already feel stupid for asking because everyone and their dog already seems to know the answer to this. But, Google and GBATemp haven't helped me so far, so I my question ist: What actually is a legit .CIA? And, what makes a legit .CIA a clean .CIA? A quick answer will suffice, I already know what a .CIA is. Speculation from here: I assume a legit .CIA is from an eShop title you actually purchased and created, f.e. with FunkyCIA. Legit .CIA seem to contain stuff that illegit ones (ones created from .3DS files or downloaded from the net) don't have. For this reason, legit .CIAs are installable (without any additional tools or hardware?) on an unmodified SysNAND. I have no idea what makes a .CIA a 'clean' .CIA. EDIT: Already perfectly solved, and we also have a sticky for that now.