Installation:
Extract the shaders folder inside one of the archives to your common folder in your GTA IV main folder - C:/Program Files/Rockstar Games/Grand Theft Auto IV
Patch 3&4 are for GTA IV v1.0.3.0 & 1.0.4.0
Patch 7&ELFS is for GTA IV v1.0.7.0 & Episodes from Liberty Cities