First, I need to check if these tools actually exist. PKG files on PS4 can be tricky because the console is proprietary. The PS4's firmware has security measures, so extracting .PKG files might require a jailbroken system or a specific tool that works with a particular firmware version. Tools like "Easy PKG Extractor" might exist for developers or modders, but using them could violate the terms of service or be against Sony's EULA. Plus, using such tools might require a PS4 in a specific state, like having an earlier firmware version that's not signed anymore (like version 4.x), but PS4 6.72 is relatively new, so maybe there's a way now.