Not all PKG files are the same. Identify your file before downloading:
Since PSNDL is a database of links to Sony's official servers, these files are original assets and require a "homebrew-enabled" console or an emulator to bypass digital rights management (DRM). psndlnet packages install
For example, if you wanted to install a package named "logger," you would type: Not all PKG files are the same
Older methods that involve running a specific app to "resign" the licenses. psndlnet packages install