Quite easy.
First you have to deinstall everything which is GP4 related. Like GP4 itself, GPxPatch and ZAZ Tools.
Then
- Install GP4 from Scratch (by CD or Image)
- Install GP4 Patch (Version 4)
- Install GP4 Patch (Version 9.6)
- Replace the GP4.exe with the decrypted GP4.exe
- Install GPxPatch Version 4.30a
- Install ZAZ Tools (Version 1.26)
- Run the Game (before installing any Mod), by starting GP4.exe / If you run a 64bit Computer, you need to change the compatibility for GP4.exe and GPxPatch.exe to "Windows XP Service Pack 3".
- Adjust the resolution in f1graphics.cfg
- Start ZAZ Tools and install the 2014 Mod by doubleclicking it. After Installation is finished, everything should be o.k.
Greetings