The vast majority of mods require version 1.0.8.0 or older of GTA IV, and they're better versions overall.
Here's a quick and easy guide on how to get 1.0.8.0.
Downgrading automatically
- Download ZolikaPatch IV and extract it into your game folder.
- Run the game, it will ask you to downgrade. Press OK.
Manual method (for advanced users)
- Create an antivirus exclusion for your game folder. (Optional but heavily recommended)
- Download the downgrade archive.
- Extract the contents of the .zip into your game folder, replace all if prompted.
- Run vcredist_x86.exe and let it install.
- Run the game.
Note that the manual method will move your savegames!
You'll have to move your savegames from:
Documents/Rockstar Games/GTA IV/Profiles/(profile ID)
into:
%LocalAppData%/Rockstar Games/GTA IV/savegames/user_ee000000deadc0de
Additional notes
- ZolikaPatch and IV Tweaker are already bundled with the downgrader, you don't need to get them separately.
- If you're using the Rockstar Launcher version, you'll now have to start the game via PlayGTAIV.exe in the game folder instead of the launcher, as it auto-updates otherwise.
Optional mods
Alternate manual archives for advanced users