Hi guys! sonic2756's Unique Header Discussion thread is going quite big, so i will check it and add here all of the original headers posted and collect it here. If you want to discuss technical data, please us his thread instead of this tutorial. Post here only questions about the tools to use to edit your headers or if a game doesn't work. UPDATE February 2015 : Nintendo started banning users playing online. We suspect the use of Public Headers, but the real detection method is currently unconfirmed. Use this guide at your own risk. More information about the first 3DS banning wave : https://gbatemp.net/threads/nintendo-begins-banning-pirates-from-3ds-online-service.381168/ I will describe easy method for write new header on scene releases. It doesn't work everytime, so try different headers. Remember, if you use eg. US header on EU rom it works, but you have to accept Nintendo TOS again. IMPORTANT: change header will make your old saves non working, so backup it first! IMPORTANT COMMA 2: the same header can be used for more than one game. NEEDED FILES: 1) GATEWAY ROM PATCHER 0.6 (Alternative Link) 2) A valid .bin header from the list below 3) A scene ROM If links goes off send me a PM, I will reupload ASAP. WRITE BIN HEADER ON SCENE ROM: 0) First thing: MAKE A BACKUP OF THE ROM! 1) Open your scene backup with GATEWAY ROM PATCHER 0.6. It should look similar at the image below: 2) Uncheck "Ask to create blablabla", then click on the Import button, then load your .bin header. If Chip ID or Media Type are not corresponding, then GRP will show this: Click YES 3) A wild button "Inject" appears! Click on it. 4) Rename your rom from .3DS to .3DZ 5) Enjoy online! BIN HEADER BACKUP: 1) Backup your original 3DS card with Gateway 2) Copy resulting 3ds file on your PC 3) Download and open GATEWAY ROM PATCHER 0.6 4) Load your rom 5) Click on Export button 6) Share the resulting .bin file, indicating the Game Name, Region, Size and Type of save SHARED BIN HEADERS:Luigi's Mansion US (CARD-1, 1GB)Kirby Triple Deluxe US (CARD-1, 1GB)Metal Gear Solid 3D JP (CARD-1 4GB)Pilotwings Resort EU (CARD-1 128MB)Pokémon Y EU (CARD-2 2GB)Monster Hunter 4 JP (CARD-1 2GB) Thanks to everyone for programs, threads, tuts and bin files.