Playstation 2 timecyc for PC.
There are dozens, maybe hundreds of PS2 timecyc mods out there. Why should I download this one?
Because it's original timecyc from Playstation 2 version of the game. Basically, it isn't even a mod, it's original timecyc configuration made by R*.
What does it change exactly?
It affects overall gameplay experience. It brings shading/lighting (on cars, pedestrians, objects); car colors are a lot brighter and vivid, and makes the weather feel more warm (unlike PC version of timecyc, where atmosphere is kinda pale and lifeless). It'll make it look much more similar to PS2 version of the game.
So, go on, download, rate and comment, and most important enjoy.
Make a backup before applying the mod to your game.