What is Fwatch?
Fwatch is a program extending Operation Flashpoint's scripting functionality.
It creates a hook on file operations. When the game attempts to open file with a special name Fwatch takes over. It's able to perform a variety of operations (like read/write text files, manipulate strings, use WINAPI) and send results back to the game.
It was created by Kegetys in 2005. This project (which started in the late 2010) is a continuation. It features 104 new commands (130 in total), compatibility with 1.99 and 2.01 versions of the game and has several old issues fixed.
Fwatch does not work with the Remastered version of the game, only with the legacy version.