Most script-based mods for Vice City run on the CLEO library . You will need to download and install this first by placing the cleo.asi and CLEO folder into your main game directory.
GTA Vice City Cheat Codes for PC: Complete List - Reliance Digital gta vice city 10 star wanted level editor mod
The primary draw is the ability to unlock 10 wanted stars , far exceeding the vanilla cap of six. Most script-based mods for Vice City run on the CLEO library