...Not finished, coarse outline for now...
- Download the latest "natives.h" and "natives.json" ("natives.h": https://alloc8or.re/gta5/nativedb/, "natives.json": https://github.com/alloc8or/gta5-nativedb-data, or both at http://www.dev-c.com/nativedb/)
- Download NativeHashUpdater (https://github.com/indilo53/NativeHashUpdater)
- Put "natives.h" and "natives.json" in the folder NativeHashUpdater/bin
- Put the file "MakeFilesFor372.bat" from this repo in the same folder
- Run "MakeFilesFor372.bat"
- Clone the repo https://github.com/Sainan/GTA-V-Script-Decompiler
- Put the output inside this repo 'Resources' folder
- Compile the "GTA-V-Script-Decompiler"
- Download "all_script_names.txt", "bulk_decompile.php" from https://github.com/Sainan/GTA-V-Decompiled-Scripts
- Make a folder named "GTA V Scripts" and put these files in it (from step 9)
- Put the output of GTA-V-Script-Decompiler/bin/Release in this folder as well
- Download php (https://windows.php.net/download/)
- Edit config.ini as needed for output options
- Run [path_to_your_php_folder]/php.exe bulk_decompile.php
- Enjoy!