NETĪ version of Script Hook that allows scripts written in. Always check the installation instructions of the mods you download. asi file that you drop into the same folder, though some may have a few extra files. That's pretty much it! Most script mods you download will have a single.
On Steam, it's 'Steam\steamapps\common\Grand Theft Auto V'. Take dinput8.dll and ScriptHookV.dll (and the trainer, if you want it) and put them in your GTA 5 game directory, wherever GTA5.exe is located. It allows for all sorts of cheats in single-player, like changing your skin, changing the time of day, teleportation, invincibility, and more. NativeTrainer.asi: You don't need this trainer, but it's there if you want it.ScriptHookV.dll: It allows custom scripts to be used in GTA 5.
In the zip file, there's a folder called 'bin' with three files in it. Just be sure to use the download link inside the table on the bottom-right: there are advertisements on that page that also say they are downloads. Here is the link Blade provides to download ScriptHook.