Mojang.png help : Idk if this is where i should put this

[Modernization]

I made my own custom modpack and I searched this online but no one actually gives you an answer- when I load up my modpack it gives me the default forge loading screen (as seen in the image below). I know I can change this for ME, but how do I make it so everyone who downloads my modpack has it already instead of them having to change the mojang.png themselves. I'm using technic launcher and my modpack is called "Modernization Pack" With the little astronaut as the logo. Also if you get the chance, how do I change the icon on the "hotbar" or whatever the thing on the bottom of the page is called when you load up the modpack (Hexxit's is a little skull)