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Tuesday, 9 September 2025

GP4: Guide to Zaz Tools - CSM process update

I know some of you have had some issues with my recent mods (1994 v4.3, 1993 v2.0, 2025 mod) that rely on the injectdll to function correctly, but many of you, with some support, have managed to get it working. You can read more about the benefits of it here: www.grandprixgames.org

Here, I hope to share all my knowledge for those who are still struggling with it. 

Installation of Grand Prix 4

Firstly, this assumes that you have installed Grand Prix 4 in its default directory i.e.

 
C:\Program Files (x86)\Infogrames\Grand Prix 4

It should be fine if it is in a different location. 

Installation of Zaz Tools 1.27C

Secondly, Zaz Tools 1.27C prefers to be installed in its default directory. 

C:\Program Files (x86)\ZaZ GP4 Tools

(You can download Zaz Tools 1.27C here: DOWNLOAD)

It also works best with these compatibility settings (I have used these in Win 10 and Win 11)


In my antivirus, I had to make an exception for the whole Zaz Tools directory. 

Installing Zaz Tools 1.27C modified - CSMProcess_setup


Next up, you need the CSM update: (DOWNLOAD)

When you run it, it will place csmprocess.exe into your Zaz Tools directory - so direct it to where you have installed Zaz Tools. 

If you are running anti-virus software, you will need to create an exception to this file, but if you have already created an exception for the directory above, this should not be necessary. 


Next, it will ask you where your GP4 is installed. As noted in the text, it will check if the path to the Grand Prix 4 installation folder is valid for CSMProcess.exe i.e. it will check if there are brackets in teh path i.e. the (X86) bit.

If that is the case, then it will create a directory junction, so that you will see the GP4 installation in your C drive i.e. C:\Grand Prix 4

Then click install.



CSM Paths

Check if your CSM has updated its paths, if not, then you may have to edit this manually. 

As above, the important thing is that the path does not contain brackets, that's vital for the CSMProcess to work correctly. 


Zaz Tools Log files

After you have ran one of the mods that uses the injectdll function, 

C:\Program Files (x86)\ZaZ GP4 Tools\Logs

In this directory, you should see csmprocess_IndividualMeshesAndTextures.log


This is how it should look if it was successfully applied. 



I trust that if you follow these simple steps, you can enjoy all the benefits that this brings. 

Keep racing!

Monday, 8 September 2025

GP4: F1 2025 Mod v1.0 (CSM)

It's here and ready - the 2025 CSM mod has just dropped. 



As with my previous 2023/24 season mods, this mod is the base mod with everything working smoothly. So it is a kind of work in progress release, designed with future add-ons in mind. 

The mods that I have released this year have been redesigned to make use of Öggos' InjectDLL and bringing new features to current season mods. Whilst the structure has many similarities to the previous seasons, it has significant changes means this is a completely new mod. 

Much of the content in this mod has been released here: https://fongugp4.blogspot.com/p/gp4-2025-download-sources.html

All the cars have been brought to us by the RSCT team of Excalibur and Isaint. I have modified Isaint's cars a little, mostly bug fixes to stop the flickering textures and I have repositioned some of the rear wheel hubs to be more realistic. 


I have also taken all these cars and created them for internal cockpit use. This is a new feature, and with the dashes on the wheel instead of the cockpit shape, it makes for a much easier conversion. Because these cockpits use the main texture, track specific liveries work seamlessly without any additional editing.

Also new, to go with the individual cockpits, are steering wheels for each team. They are based on the 2024 versions and both internal and external versions of these wheels are in the game. As it remains a limitation to run one steering wheel for all teams, you simply need to select a driver from the CSM menu to use that team's steering wheel. 

Thanks again to Excalibur for his excellent 3D rims, however I have amended the size of them and created lods, as in previous seasons with Carl_gpgames. 

Thanks once more to Gitanes for his work on performance files, including torque files, physics and magic data files for each track. The magic data, as in previous mods, is a little experimental, it does depend on how you install your tracks and the TSM profile name you use. I have added an option to turn the torque tweak off, this occassionaly makes cars sit in their pitbox for a good while before the mechanics start work - it is not a foolproof fix though. 

Thanks to Mailson_Teles for his lovely loading screens and to jcgrj for the 2024 engine sounds.

I will talk about the new helmets in their own dedicated post, but I'm indebted to Theofilos for creating and sharing his Real Helmets Project. So far only the Arai and Bell helmet variations have been done, a very nice upgrade from before. Thanks to Excalibur for help in the conversion. Instead of waiting for the set to be complete, I have quickly painted some Schuberth and Stilo helmets on Jvinu's shape for the time being. These temporary helmets are not as accurate as the main set. 

To get this mod released, I had to rush to put some generic items in, like high resolution team arts, plain pitcrews and engineers, not in any way accurate. There remains a generic internal visor. To get this mod released, I thought it was better to have something generic, and these can be patched later as people create them. 

As always, thanks to a good number of community members who made this mod possible - some of them long gone from modding sadly, but their work is still being used to this day. 

  • Carl_gpgames - CSM structure base, Generic internal cockpit, pitprops, pitmonitor, GPxPatch graphics, background videos, music and GP4 Memory Access and coding help. 
  • Öggo - Blender plugins, Car Collision editor, Individual tyres & helmets tweak, Visor colour cap, gpf editor, Injectdll, csm procss and general support and bug fixing.
  • 32bobo32 - Pitcrew & Engineer Template, Director & marshal skins. Hi res menu items, no refuel animation, menu fonts, HUD. hi res menu font
  • prblanco - various caps
  • gplaps - DirectX 8 patch
  • crosire - DirectX 9 patch
  • gp4wonder / DOSOAL - Sound Hardware Acceleration
  • Petrus - GPH Updater
  • btone & Ruboy - Def Panel
  • Duffer - LCD font editor
  • Zaz  - CSM, TSM, Slimtex... and the rest of Zaz Tools
  • Rene Smit  - GPxPatch
  • Madman271 - GP4Tweaker
  • Lo2K  - GP4 Builder
  • KerleyF1 - general help, support and testing


Installation Notes

Zaz Tools & GpxPatch

As with all my mods, you will need Zaz Tools and GpxPatch installed. You will also need to install CSM Process (CSM Add-on) for this mod to work too.

Follow this guide to help you install it: Guide to installing Zaz Tools and CSMProcess

Download GPxPatch Download Zaz Tools Download CSM Add-on

2025 CSM F1 Mod

Download and install this mod from the CSM menu

Download Part 1 Download Part 2

Happy racing!

Tuesday, 2 September 2025

ICYMI - Summer 2025

It's been a little while since I have posted on my blog. Inactivity on the blog does not mean that I am not busy working on projects, but mods takes time and dedication and sometimes real life has to take precedence.  

You may have noticed, this site has been going through a bit of a rebrand, hopefully to make things easier to see and find. This is not least because there's close to 100GB of downloads now available on this blog.

However, that has not stopped the community from being busy and sharing their works. 

There's been a flurry of activity on the 2025 cars, and Excalibur and Isaint have been doing a great job in bringing the entire grid to Grand Prix 4. 


New Tracks

Magny-Cours 2001 HD AI

by Hega More Info Download

Autódromo San Nicolás - Argentina

by Viking75 More Info Download

1964 F1 Zeltweg - Austria

by Viking75 More Info Download

Circuit de Invalides, Paris, France

by Viking75 More Info Download


Mods

F1 1991 CSM Mod

by Kerleyf1

This is a modernisation and update to one of the classic GP4 mods

More Info Download part 1 Download part 2

2005/6 ChampCar CSM Mod

by Lee1971/RSP

This is not a new mod, I have simply converted it to be used via CSM

More Info Download CSM Mod


SkaningeN's updates


Cars

1997/8 Steering Wheels

1997/8 Steering Wheels

by rracunis

This pack includes internal and external steering wheels. **updated 4th September 2025**

Add On Info Download pack
2003 BAR Black Test Car

2003 BAR Black Test Car

by Ross Hunter, CTDP

This is one is from the archives, thanks Ross Hunter for sharing it with me back in the day, and Quickslick for requesting this (or one very similar to this).

Add On Info Download
1999 McLaren MP4/14 updated

1999 McLaren MP4/14 updated

by Hega, CR Formula

A very nice update to the front wing and rear wing at specific races. 1999 is coming together nicely

Add On Info Download


We have a great community with lots of talent still modding this game. Enjoy and keep racing!