The standard community application used to convert .iso files into .pkg files. You can download the latest version from authoritative homebrew repositories like the ConsoleMods Wiki .
If you have a specific game in mind you'd like to try converting, I can help look up its compatibility notes. ps2 fpkg
: Supports widescreen patches, lightbar color customization, and custom LUA/TXT patches to fix graphical glitches. Compatibility and Limitations The standard community application used to convert
The Ultimate Guide to PS2 FPKG: Playing Classic PS2 Games on Your PS4 : Supports widescreen patches
: Unlike standard PKGs, which require a digital license or a physical disc to verify ownership, FPKGs are modified to bypass these checks, allowing them to run directly from the PS4's internal or external storage once the system is in homebrew mode. Essential Tools for Creating PS2 FPKGs