If you have just installed the game, do not mod it yet.
When the game crashes, modders are advised to restore the original models folder to rule out asset corruption. If the crash persists, the issue lies elsewhere (e.g., scripts, CLEO, or data files). Original Models Folder For Gta Sa
Sometimes, restoring the models folder does nothing. The game still crashes. Why? Because mods often install additional files that hook into the models folder. If you have just installed the game, do not mod it yet
If restoring the original gta3.img didn't work, check three external locations: Sometimes, restoring the models folder does nothing