Recently, an modified version of FBI was released on reddit. This version included some unfinished memchunkhax2 code. This version allows us to install legit CIA files above firmware version 9.3.
So, let's get started!

FBI Download

Download Link: http://a.pomf.cat/qgqnld.zip
Download this file.

Once you've downloaded the .zip file, extract it and open the folder you've extracted it into.
There should be 4 files, but FBI.3dsx and FBI.smdh are the ones you're looking for.

Create a new folder in the /3ds directory on your 3DS' SD card called FBI, and paste those 2 files into this folder. You should now see FBI in your Homebrew Launcher.

Don't forget to put a LEGIT CIA somewhere on your SD card. I won't provide links for those, but here's a list of games that can be downloaded as legit CIA's. Also make sure they match your 3DS's region!

List of games that can be found as legit CIAs (depending on region)

EUR Legit CIA
Animal Crossing New Leaf
Fire Emblem Awakening
Kirby Triple Deluxe
Luigi's Mansion 2
Mario Kart 7
Monster Hunter 3 Ultimate
Monster Hunter 4 Ultimate
New Super Mario Bros. 2 Special Edition
Super Mario 3D Land
Super Smash Bros. For 3DS
The Legend of Zelda Majoras Mask 3D
Tomodachi Life




Region Free Legit CIA

Pokemon Alpha Sapphire
Pokemon Omega Ruby
Pokemon X
Pokemon Y



JPN Legit CIA


New Super Mario Bros. 2
Tomodachi Collection New Life



USA Legit CIA

Animal Crossing New Leaf
Fire Emblem Awakening
Luigis Mansion Dark Moon
Mario & Luigi Dream Team
Mario Kart 7
Monster Hunter 4 Ultimate
New Super Mario Bros. 2 Gold Edition
Super Mario 3D Land

Go to the homebrew launcher, boot up FBI, and press any button. If everything went correctly, you should now be able to navigate trough your SD card and select the CIA you downloaded with A. The time it takes to install depends on the game size. It took me 2 min to install Super Mario 3D Land, but it took me 6 mins to install Majora's Mask 3D.

If the text looks broken, try again. It usually takes a good amount of tries in order for it to work. Still not working after 10 tries? Or is there an error when installing an CIA? Keep trying, but first check out the troubleshooting section.


DISCLAIMER: This is a VERY unstable build of FBI. Even though there are no reports of anybody bricking their 3DS' while doing this, there is still a chance of bricking your 3DS while doing this. So, I'm not responsible for any damage whatsoever if something DOES happen to your 3DS.

Troubleshooting

First of all, if the text looks all broken in the beginning, or FBI simply freezes, try rebooting. Just keep trying.

Make sure you're using Menuhax though. It seems like it only works with that. I've tried Ironhax numerous times, but on menuhax it worked on the second try. Correct me if I'm wrong though.

If you're getting any type of error when trying to install a CIA:
Try making some space. Don't forget that you need TWICE the space of the CIA in order for it to install correctly. If that doesn't work, try a different CIA.

You could also try booting into another app first, exiting, and then booting FBI.

Users have reported that if you boot into the HBL, start CHMM, exit, and THEN boot FBI, it should also work.

Or, you could just try the eject trick:
1) Open homebrew launcher through Menuhax
2) Launch ftBrony and quit with B.
3) Launch FBI and quickly eject your game cartridge while pressing A at the same time.

This also seems to work:

1. Open FBI through oot3dhax.
2. Make sure it says cleaning up. If it does, press A.
3. Exit FBI by pressing start.
4. Open BlargSnes
5. Exit BlargSnes and open FBI again
6. Profit.

I hoped that helped you guys. If I made any mistakes, please feel free to correct me.

 

You know what, I'm gonna try it.

 

This doesn't downgrade. It installs legit CIAs on 9.3 and up.

 

The firmware files are legit cias.

 

We're not, we're installing legit cia's.

Also, confirmed to work.

 

Anyone tried no legit cias? (Have a hardmod)

 

Can't you only install certain games like this or can every game become a legit .cia?

 

The former.

 

i might try this out. Any reason why it dosent work with ironhax?

 

This threat very useful but I cant understand this thing:
We can brick system on downgrading or installing legit cia? Which one risky?

 

Could someone help me to get this working?