San Andreas Mod Loader is an ASI plugin for Grand Theft Auto San Andreas, which greatly simplifies the installation of any modifications.
Its main feature is that the files of the original game are not affected in any way, and backups are no longer necessary.
To install any modification, it is enough to throw a file / folder into the modloader folder, and enjoy the game. Everything is described in more detail in the ReadMe, which, unfortunately, is in English. However, it is very easy to understand.