PKG files are executable code. A malicious PKG could:
Always download from trusted communities with active moderation.
Below are two workflows: official PSN method (recommended) and PKG installation (advanced). Ps1 Pkg Games For Ps3 Download
Benefits: safe, legal, no firmware modifications.
Assume you have a legally obtained PKG file on a FAT32 USB drive in a folder named PKG. PKG files are executable code
The Sony PlayStation 3 is unique in console history because it contains the actual hardware of the PlayStation 1 (PS1) inside it. This means the PS3 offers near-perfect native backwards compatibility with PS1 games. While original discs work on most models, many users turn to digital "PKG" files to store their entire library on the hard drive.
This guide covers everything you need to know about PS1 PKG files: what they are, how the conversion process works, and how to install them on your console. Benefits: safe, legal, no firmware modifications
This is the most infamous error. It usually happens when installing PKGs meant for a specific PSN account ID on a different console.