1.- Copy the files EmuNAND9.dat y Launcher.dat (REPLACE if there exists because the launcher is not Gateway, it's other homebrew) into SD
2.- Turn on your 3DS on sysnand (8.1 for this tutorial, also testet with 4.xx, 7,xx y 6.xx) with SD in there and go to the browser and write: go.gateway-3ds.com and the DevMenu show up: Here go to SysNAND Options
3.- Choose “Health&Safety Dump” and hs.app is dumped into your SD
4.- Turn off your 3DS and go to SD on your PC, copy hs.app file and move it to the folder PASO 2 and move it agat to the folder INPUT ( “TUTORIAL 8.1-9.2\PASO 2\PC_Apps\UniversalInjectGenerator\input”.)
5.- After that go back to “UniversalInjectorGenerator” folder and launch the file go.bat . Wait until create two files: “BigBlueMenu_inject_no_banner.app” and “BigBlueMenu_inject_with_banner.app”.
6.- For this tutorial is better choose “BigBlueMenu_inject_with_banner.app” and rename to “hs.app”. After tha copy that file to your SD.
7.- Turn on your 3ds with your SD and repeat Step 2. ( go.gateway-3ds.com ). In there go again to SysNAND Options.
8.- Now choose Health&Safety Inject and follow the instructions(press UP, DOWN, LEFT, RIGHT, A ).Don't worry, this not brick your 3DS.
9.- Now, turn off our 3DS and copy CIAS FOLDER on our SD.
10.- Turn on our 3DS and launch our RXTOOLS( with “launch.rxtools.net” or other way you know). We need to use recovery menu for this: ( You can use recovery menu pressing R in rxtools).
11.- We CHOOSE Launch rxMode in SysNAND and wait to go 3DS MENU.
12.- HERE'S THE TRICK. The app Healt&Safety now is "BigBlueMenu" ( The logo on up screen says all). Now, launch the app.
13.- Choose the option "SDMC" and go to "CIAS" folder.
14.- Install ONLY DevMenu_2x.cia.
15.Exit to home menu and launch the new app DevMenu_2x
16. Go to “Import” and go to "CIAS" folder, install “old3DS.AGB_FIRM.Patch.cia” and “SysUpdater.cia”
17. Now turn off our 3ds and do this:
18.- NOW in our SD go to RENAME or BACKUP IN A FOLDER some files:rxTools folder, rxTools.dat file and firmware.bin. After that we can move our TEMPORAL rxTools.dat y firmware.bin, BECAUSE THIS FILES WORKS WITH RXTOOLS 2.5 ( YOU CAN COPY "PASO4" update folder to your SD too (is the 9.2 update for OLD 3DS).)
19. NOW put the SD in our 3DS and launche "rxTools" with "launch.rxTools.net" and press R for recovery. Here CHOOSE “DevMode”.
20. Choose "sysUpdater" app and launch it.
NOW PRESS A for start to UPDATE. Now wait and after that, you have 9.2 firmware for coldboot and menuhax.
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