Hacking SKYDS+ Private Header (No SkyDock)

[marcosfull]

Hello!
In my modified Old3DS I loaded an original physical game (Luigi's Mansion Dark Moon), entered "godmode9", and the script "Dump CTR Cartridge Priv. Header.gm9". I chose "Execute gm9 script" and saved the file "Private-Header_000.bin", which on the PC I opened with "HxD". I copied the 16 pairs of characters that are before the "Fs" begin and pasted them after the text line DEFAULT_GAMESAVE_KEY= from the file "settings.txt" of the sky3ds+ SD (without spaces). In my other unmodified New3DS console, I entered "Animal Crossing New Leaf" with the sky3ds+, where I have a game saved, but when I wanted to play online it says "Error: 002-0123". What did I do wrong or what should I modify? Is it true that the .sav of the games I had already been using with the sky3ds+ would no longer work and should I create others to take the added private header? On the other hand, I had read that with the new firmware versions of the sky3ds+ I no longer needed to create the .cfg file, which I did not do, since I never added the CREATE_PER_GAME_SETTINGS line in "settings.txt". I don't have the SkyDock. My sky3ds+ has firmware 1.4.
Thank you!
Marcos (Argentina)

 

[Quantumcat]

To solve your actual problem (wanting to play animal crossing online), install CFW by following https://3ds.guide, then use Checkpoint or JKSM to export the save file. Convert the rom to a cia file using GodMode9, install it using FBI, then use Checkpoint or JKSM again to restore the save file. No header necessary. If you need any help with the steps let me know.