Most of this was written by the people on: https://www.playstationtrophies.org/forum/final-fantasy-ix/316580-working-hail-king-script-version-ps4-42.html
These were the settings that worked for me.
In the begining of the game talk to the little girl and get the counter to 0 jumps. Start the script with WinKey+J
To stop the script and reload it use WinKey+R