Before adding mods, run the game. Nothing visually changes, but you should see a new log file appear in your root directory after closing the game: asi_loader.log . Open it with Notepad. It should say something like:
Ultimate ASI Loader by ThirteenAG is a essential tool for modding GTA Vice City . It allows the game to load custom libraries with the extension, which are used for popular mods like SilentPatch Widescreen Fix Key Features Broad Compatibility
Get the latest Ultimate ASI Loader (usually from GitHub or Labrynth). Rename/Place: Move the DLL to your main Vice City folder. Note: It is most commonly used as dinput8.dll .
In the modding history of Grand Theft Auto: Vice City Ultimate ASI Loader by developer ThirteenAG
: The loader initializes automatically the moment the game is launched. Why It Is "Ultimate"