Change aspect tft i3 mega s

Hi all .. I wanted to change the dysplay of my anycubic i3 mega.
I've always found it a bit flat as a range of colors.
I am put under and thanks to the advice on this site ( https://github.com/b-desconocido/Anycubic-Mega-TFT-Resource-Converter )
I was able to do a little bit ... unfortunately I wanted the black background and then change everything but the firmware of our tft is blocked and unfortunately for the moment you can only play with the bootlogo limited and icons and as well language translation .

I am available for any questions ..