Hi,
I tried to follow the tutorial, I deleted all datas from the game, I created a save and I downloaded the payload.bin thing (I choosed new 11.5.0.39.E since 11.6.0.39.E isn't available) and I put the files/folders in the root of the SD card.
The next step in the README would be "After that...
yo guys the sonic x shadow generations trailer dropped today, and shadow just straight up decided, and i hate (love) to bring this dead meme up, but, it's morbin time