tested in virtualbox with Windows 10 Pro 64 bits it works! image - California Megamod for Grand Theft Auto: San Andreas
CALIFORNIA MEGAMOD is a multi-mod for GTA San Andreas that contains LOTS of new stuff to improve the game at 200%, several themed mods, new game-modes, new vehicles, tuning options, new textures, new peds, new plants, new weapons, new clothes, tags, tattoos, maps, special FXs, scripts, technical improvements, etc. California Megamod allows you to have different mods and total conversions at same time in just 1 GTA San Andreas, and play the one you want with just a few clicks with the mouse... ... Este es un conjunto de mods singleplayer para Grand Theft Auto San Andreas que mejora el juego al 200% ademas de contener muchos diferentes Modalidades de juego, (gamemodes) algunos tienen diferentes vehiculos, piezas de tuning, armas, texturas, personajes, ropas, tatuajes, mapas y mas cosas... El California megamod te permite tener instalado 1 solo gta san andreas pero jugarlo como si fueran muchos (jugar con mods distintos cada vez)
if you need more info about how to get California Megamod working in Windows 7, 8, 8.1 or 10 then visit my website: mods-gta.blogspot.com
Windows 10 also says that GTA SAN ANDREAS needs DIRECTX 9.0C, ok you just go to the main folder from California Megamod 3.0 and there you will find a folder titled "use this if you have windows 8", get inside the folder.