Inside the zip file search for the files dsound.dll (or dinput8.dll for newer version) and ScriptHookV.dll, copy them to your GTA5.exe folder: This is the responsible for 'hacking' the game memory and load the ScripthookV that will load. ScripthookV works in cracked versions too, but the game patch must be the compatible one. The actual version of scripthookV works with game patch 1.0.335.2, so, to use it you may need to downgrade your gtav to this game patch, check how to do this in this video. With those files you can start making your own scripts for GTA V PC or use scripts made by other people :) The hook script disables custom scripts when the player moves in multiplayer to avoid the ban. Please note that the Script Hook V does not work in GTA Online.

This batch files may help you doing this task, it simple rename those files for you enabling or disabling the loaders. Script Hook V is a library that allows to use scripts for GTA 5 in the format. So, always remove your dsound.dll or dinput8.dll from GTA5.exe folder before launch the game to play in Online mode. *** Attention - Always disable your 'loaders' (ASI loader, FOV mod and others) when you plan to play the Online mode of GTA V to avoid being banned.