If you are looking for the correct way to write or stylize the name of that specific utility, the proper text is GTA IV Pro Fixer
commandline.txt in your game folder and add the following lines to help the game manage memory better:
-norestrictions
-nomemrestrict
-availablevidmem 2.0
-percentvidmem 100
It includes a limiter to ensure game physics don't break when playing at 60 FPS or higher. Step-by-Step "Pro" Optimization Guide gta iv pro fixer
(often referred to as GTA4 Pro Fixer ) is an unofficial patch/modification created by a modder known as ProTroop / ProWorks . It aims to resolve many of the persistent bugs, performance problems, and glitches present in Rockstar Games' notoriously poor PC port of Grand Theft Auto IV (including The Lost and Damned and The Ballad of Gay Tony ). If you are looking for the correct way
These are currently considered the industry standard for a "pro" setup: Fixing GTA IV with 4 Mods (2026 Guide) - Steam Community Commandline: Create a text file named commandline