I have finally managed to get it to work. And I'm proud :)

So if it wasn't obvious this mod replaces the texture of the phone to a modified one by me :D.
It puts memes or just some random pictures in place of these boring default checkmarks and X.

What are these you may ask?
They are the good ol' dolis, hackrmann, YIPPIE! and a message to the government.
check the Images tab if you want to spoil it for yourself or just make sure it's nothing disgusting

I also want to thank 2 people for helping me with this thing but I'll not name them in case they're not willing to be named here. :)