How Far Cry 1 Root Folder looks:

it is where you'll install needed stuff

1️⃣First method — Launcher installation(best way - recommended):
1) Download launcher: Launcher Latest Version

2) Install the launcher into root game folder.

3) Start the launcher and wait for the update, then play.

2️⃣Second method — Manual installation:
1)Download MANUAL VERSION OF FCAV: FCAV MANUAL DOWNLOAD

2)Before this be sure to delete OpenFC from Far Cry 1 Root folder and FCAV out of Mods folder(which is located in root game folder)
if you had previous version of FCAV

3)Extract out of downloaded file FCAV.zip two folders (OpenFC and Mods) into ROOT GAME folder (it's not bin32).

🔴FAQ: CLICK

🔴 If you have "Error of detecting" - this might be some issues with microsoft one drive hosting. Check manual installation above.  

🔴 If your game crushes on starting or loading of the level, disable vulkan render in launcher, or remove/rename d3d9.dll file from OpenFC folder.