Here is the shortly and quickly Tutorial for the GTAIV-Mod-beginners:
1. You download
this package , Simple Native Trainer V. 5.2
2. UnRar the files from the .rar-archive into your GTA IV-Root. [Example: C:\Program Files\Rockstar Games\Grand Theft Auto IV\]
3. Start InGame the Trainer, you must press the
F3-button. But when you press the F3-Button again, is the menue not to see. You must press the Key F4. Then you see the pretty
Menu for the Trainer.
4. Have enjoy!
You can navigate in the menu with the numpad. [4,6,8,2]
Previous version (4.

find you
here.
The ScriptHook is in the .rar-archive included.
Please install the newest Update for your game, when you will use this trainer.
Sorry for my bad english, i have tried to translate my
german tutorial