This mod will add PS2 sky colours and lighting to San Andreas. No, this is not just the timecycp.dat renamed as timecyc.dat. I have extensively tweaked the file to make it look like the PS2 version of the game as accurately as possible (e.g. greenish sky in Los Santos). I have also used colour correction to make the colours more vivid. In addition, you'll get the advanced lighting of the sun on pedestrians and objects. NOTE: this modification DOES NOT add the PS2-style sun glare effects depicted in one of the screenshots. That is a separate, CLEO mod.
Replace the existing timecyc.dat with my timecyc.dat. Backing up is recommended should you want to revert to the original file if you don't like my mod or have issues with it.
The default location of the timecyc.dat file is C:\Program Files\Rockstar Games\GTA San Andreas\data for 32-bit editions of Windows, and C:\Program Files (x86)\Rockstar Games\GTA San Andreas\data for 64-bit editions.