I focused on lighting and shadowing to give a Q4 more "modern" look.
Some SSAO to improve shadows.
Reflective bump mapping to force metal surfaces looks more "metallic" instead plastic
Added HDR, ambient light, some color correction and subtle motion blur.
Hope you enjoy it!
Sorry for my english ;)
Just download and extract to game folder.
Keep in mind - performance hit can be HUGE for such an old game!