Hi everyone, first of all, you must download Kaldaien's Untitled Project X on steam here : http://steamcommunity.com/app/359870/discussions/0/364041517007524857/
Extract the archive at the root of your Final Fantasy X/X2 HD Remaster directory.
Then, grab my mod and extract to "Where the game is installed\Final Fantasy X X-2 HD Remaster\UnX_Res\inject"
And that's it ! 
Enjoy :)

Ps : Feel free to add your screenshot with my mod on :)

My other mods 

Yuna Dark Aeons
HD Sphere Grid normal and expert
Normal Sphere Grid Icon HD remade