Fongu's blog and GP4 downloads: Fongu's Mods

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Saturday, 4 July 2026

GP4: 2026 CSM & non-CSM mod by fongu

The first version of the 2026 Grand Prix 4 Mod is finally here!

First and foremost, I'd like to thank all of the original authors whose work has made this release possible. My role has largely been to compile, adapt, and bring everything together into a complete package.

This release features the full 2026 Formula One grid, with cars created by Excalibur and Isaint. I was also pleased to contribute by creating several of this year's cars myself. The Cadillac livery has been revised and is now much closer to the real-world design than the version included in the initial release.
This release also introduces special liveries for used in the early season Grands Prix:

Japanese Grand Prix – Mercedes, Racing Bulls and Haas special liveries.
Miami Grand Prix – Racing Bulls, Alpine, and Cadillac special liveries.

These are included alongside the standard 2026 season liveries

The 2026 helmet set has been built on Theofilos' excellent RHP helmet templates, along with Jvinu's Schuberth and Stilo templates. I'm grateful to both of them for providing such a solid foundation on which to paint my own helmets.

Many thanks also go to Excalibur for the updated tyres and the new 3D wheel rims, which add another level of authenticity to the cars.

As with previous releases, this mod benefits enormously from Öggo's GP4++, which brings a wealth of graphical and gameplay enhancements. The flashing lights in particular look fantastic. I've also included gplaps' z-buffer fix. While this feature is now available within GP4++, it is configured here to work alongside crosire's DirectX 9 patch for the best compatibility.

Thanks again to Öggo for making individual cockpit shapes possible. This allowed me to convert cockpit interiors directly from each car, and this release includes the new Aston Martin internal steering wheel.

As always, a huge thank you to Gitanes for his outstanding performance files and physics, which continue to provide an excellent driving experience.

I'm also grateful to Mailson Teles for sharing his updated 2026 TV graphics package, which introduces several exciting new features.

The sound package included in this release is the excellent 2025 Red Bull Honda set by jcgrj.

There are many more contributors who deserve recognition, and a full list of credits is included with the mod. Without the work of the entire GP4 community, this project would be a shadow of what it is.

For a number of reasons, I've had to scale back my modding over the past few months, so I apologise that this release has taken longer than I had hoped. My original plan was to include several additional features and improvements, but unfortunately time simply didn't allow me to complete everything in time for this first release.

As with last year's mod, there is also a non-CSM version which is available too.

I hope you enjoy the mod, and thank you all for your continued support of the Grand Prix 4 community.

GP4: 2025 stand-alone mod (GP4 Memory Access)

F1 2025 Mod compiled by fongu

Let me wish you a very happy New Year.

I am proud to release to you the 2025 mod as a non-CSM, stand-alone version, the first mod to be released using GP4 Memory Access.

Like the CSM mod, this is a little bit proof-of-concept than a full blown complete mod. This mod shows a working example of how to use GP4 Memory Access by Carl_gpgames and Öggo.

I've spent less time creating content and more time in exploring new features to present to you - hoping that other authors may be able to fill in some of the gaps.

All of the content is already compiled in the CSM version of the mod: 2025 CSM Mod

This has no tracks included, no driver changes, no additional liveries and no special helmets - it's just a generic base 2025 mod.

What is new to this mod, and will soon be added to the CSM version, are the 2025 TV graphics by Mailson Teles.

Installation Notes

F1 2025 Stand-alone Mod

Download

To run this mod, simply:

extract the GP4-2025 folder anywhere on your machine.
Open GP4MemoryAccess.exe
Click 'Patch & Run' on the bottom
Enjoy 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

Update v1.1

Download update v1.1

Update v1.2

Download update v1.2

Version History

v1.1 released Nov 25

v1.2 released Jan 26

Happy racing!

Non-CSM standalone version

I have released a non-CSM version for those who prefer it.

Link

Wednesday, 11 June 2025

GP4: 1993 Mod Version 2.0 by KerleyF1 & fongu

The 1993 season.

What do you remember from it?

Prost coasting to the championship
Senna's incredible season
The last time Prost and Senna shared a track
The "most technologically advanced F1 cars" ever
Andretti's ill-fated move to McLaren
Hakkinen's start at McLaren
That incredible first lap at Donington
The under-rated simmering rivalry between Senna and Schumacher
Berger's suspension failure on the way out of the pits at Estoril
Sauber's impressive debut
Irvine's debut and punch-up

The 1993 season has been faithfully recreated by so many talented modders from the community. Also, It's been a delight to work with the nicest guy in the GP4 community, my friend, KerleyF1 (grandprixmods.blogspot.com).

For a long, long time, we had talked about updating the 1993 Mod for Grand Prix 4, and it's finally here!

KerleyF1 has done great work on the structure of the mod and the graphics and painstakingly installing all the track specific variants of the cars and helmets. In game graphics like the one below look fantastic.

This is built on the work on previous mods by TomMK (from GP4 Central) and Mschumi24.

And a massive thanks to Öggo who has been involved in every car in this mod, except one late season Tyrrell 021 which was done by me. Not only that, he's created all the helmet shapes and every driver has a personalised helmet texture do a level of specificity that is mind blowing. This mod also features a lot of his tweaks that have brought this mod to the next level.

I have learned a lot in making the 1994 mod, and it was good to carry some things over to this mod.

So what's new?

The top four teams, namely the Williams, McLaren, Benetton and Ferrari, have all had their cars resized to be more consistent with one another. For the Williams, I have also extended the front wing horizontally to be more accurate. GP4Central's mod also had low downforce rear wings, which have been incorporated into this mod, along with new lower lods for them.

New tweaks include removing the refueller from the animation, and starting the race with full fuel loads.

The 1993 steering wheel brought to us by Carl_gpgames is now included. With Öggo's tweak, this is now properly rendered in 3D and enables the advanced carshader. The external wheel was added by KerleyF1, and the arms are from Carl_gpgames, whilst the glove is an adaption from working in ChatGPT.

Carried over from the 1994 mod are the pit props and the marshall. I have also brought over the new high resolution tyre treads to go with the updated 3D rims and sidewalls by Alesi_fan and Öggo. There's also lots of customisable options in the CSM menu too.

Updated sounds by jcgrj are also carried over from the 1994 mod with some sounds by Mitsuro_Sano.

Also new to this mod are individual internal cockpits. This version is a bit more refined than the 1994 mod, and as the cars created for this were done with a generic dashboard, it means I can get a working dashboard on all teams, even though the positioning is different for each car.

I have also created new visors, these ones are more inspired by the ones in the 2011 mod.

Thanks again to Gap177 for his amazing work on the existing 1993 trackpack by Plodekk and cleberpister. Here's some more screenshots from the mod with some of the new HD tracks.