HOWTO: Open the launcher, if you have not already then use the new patching tool,
use it to locate the "filelist.pak" which should be in /GTAIV/pc/data/
of your Grand Theft Auto 4 installation, patching this file allows for modding ALL the files
in your GTA4 installation.

Credit for the filelist.pak patch goes to "aru" of gtaforums.com

From then on, you do not need to patch this file again.
Next, while the loader is running; start GTAIV.

You will need to run the loader each time before running GTAIV to use modified files.

Run the "hook.exe", then run GTA4. That is all!