Once you have CFW and FBI ready, follow these steps:
This is the standard tool for installing .cia files on a modded 3DS.
To use these files, your Nintendo 3DS must have , such as Luma3DS .
Reinsert the SD card into your 3DS, power it on, and open the FBI application. Install the App: Select SD . Navigate to the cias folder. Select your Flipnote CIA file. Choose Install and delete CIA (this saves space).
With the file safely on your memory card, it is time to install it onto your system.