Unlike PS4 or PS5 piracy, PS3 PKG preservation happens on IRC and Russian forums (like ps3-place.ru and the archived psx-scene.com ). Google is useless for these files. You need:
The standard Folding@Home was a noble cause. The "Extreme Edition"—a PKG handed to overclocking teams at XtremeSystems.org—unlocked the RSX (GPU) and disabled all thermal throttling. Installing this PKG on a fat backwards-compatible PS3 is dangerous; it pushed the Cell processor to 100% utilization without safety checks. It’s an obscure PKG not for its rarity, but for its sheer stupidity. It turns your console into a space heater that computes protein structures. obscure ps3 pkg