Hello, a lot of people ask me for support for this, and I think something is so simple, but I still want to help them, well I know that just writing is not enough, so I made a video teaching my BRAZILIAN community how to do it, but also I made a text file and I teach for the AMERICAN community too, well you can watch and see if you can follow, I found it easier.
Video complete:
Server database editor
GRF editor
Client hexed 20200604
Current emulator rathena