VERSION STEAM

1 - Go into steam and delete GTA 3 (back up your saves if you dont want to lose them)

2 - Go to C:/steam/steamapps/common/gta3 and delete the GTA 3 folder if you have one (you will still have old cleo and mod files here if you have attempted to install the mod before. If you dont have the GTA 3 file in the common folder after installing dont worry that means you have fully uninstalled GTA 3

3 - Download the GTA Downgrade tool i have a link here with a readme inside on how to downgrade your gta 3 to 1.0 so cleo and the mod will work.

4 - download - Mega.co.nz this also includes the save files =XR=Productions= has provided to be used after the downgrade.

5 - After downgrading, Install the mod as usual by dragging and dropping all the mod files to your gta 3 folder.

6 - launch the game and you should have the mod successfully installed, (if people have problems I can make a video tutorial but it is a simple process)
Thanks ultimatetechfreek for this tutorial.


VERSION BOITE

1 - Install GTAIII

2 - Start a new game so the textures of the original game will decompress

3 - Exit the game and copy all the files of this mod to your GTAIII folder