Move these files into your main GTA IV installation folder (where GTAIV.exe is located).

is a well-known library for Grand Theft Auto IV that allows developers to run custom scripts within the game by "hooking" into the game's native functions. The term "HOT" in this specific context most likely refers to one of the following:

When looking for the "hottest" new scripts, always download from reputable community sites like (which hosts IV content) or GTAForums . This ensures your game stays stable and your PC stays secure.