To anyone who did the same thing but still wants to play:
Download the demo and copy the gfx_core_mod folder to your mod folder in the full version of the game
It's incomplete and clunky but most of the generally used gfx are included like walls and mountains.
I haven't tinkered around with it. Loading the game won't load graphics though so you get a hardcore playthrough :p
So you can play if you're afraid of ASCII like me