: As this is "part1.rar," you must download all other required parts (part2, part3, etc.) from the same source.
: Most .cia files from these sources are encrypted. You may need a Batch CIA 3DS Decryptor to convert the file into a format Citra can read. FEFB-USA-CIA-RF-Ziperto.part1.rar
: Transfer the extracted .cia file to your SD card. Open the FBI homebrew app on your 3DS to locate and "Install and Delete" the file. Installation on Emulator (Citra) : As this is "part1