All major textures in the game were increased to 400%+ of their original pixels, sharpened, and had some detail added. Then new normal maps were generated to take advantage of the greater detail, which results in a significant improvement over the original graphics. This enjoys 0% compression files, which helps offset the fact that larger files requires more system resources.
These are the regular size (resolution) versions of my HiRes mod. All diffuse, normal, specular, and light maps except for interface (HUD and Icons) were upgraded.