Thanks Kaldarasha. But I maybe missed something, it doesn't appear on my library in 7H
So I created in : ff7_install_path\mods\7th Heaven a folder called Textures, and an other in it.
In that Textures folder, I pasted, for example, all the team avalanche spell effects, in PNG format.
in the 7H GUI, I imported from that folder and created the .iro, and activated it.
But I don't see any visual changes, for example that spell effects..
Does I need to put him in the first load orders ?