First of all I want to say hello as I'm new here, i've been visiting the site for a long time and finally decided to make an account.
Now to my question.
I know about loading textures externally, however I've seen roms with the modded textures included such as this one.
This is a mod for the Virtual Console version of the rom and as far as I know, injecting extended roms is not gonna work.
So I'd like to know if any of you could point me in the right way, in order to put the textures inside the rom itself so I can inject it later on. Thank you.