This Mod will upscale the Sneaker Shoes and Sports Shoes which are found in MODO and Russian Shop Respectively.
All these Shoes Textures are Upscaled to 1024x1024
I created this mod for myself but then i decided to Share it.

Installation Guide:
1. Extract the Files.
2. Open, OPEN IV. Then click on EDIT MODE.
3. Then, Go to GTA IV> PC> MODELS> CDIMAGES> PLAYERPED.RPF and Drag the Extracted files over there.
..ENJOY..

Let me know if you want more upscale clothings for Niko. :)