For large PKGs (>4GB), split with or install via FTP to /dev_hdd0/packages/ .

The Mechanism and Methodology of PS3 PKG and RAP File Installation in Custom Firmware Environments

The PlayStation 3 (PS3) homebrew ecosystem allows users to back up, install, and play digital games directly from the console's hard drive. To do this, you must understand two file types: and RAP files.

The PlayStation 3 (PS3) utilizes PKG files for package installation and RAP files for digital rights management (DRM) authorization. While official firmware restricts these files to signed content from the PlayStation Store, custom firmware (CFW) and hybrid firmware (HFW) environments enable the installation of unofficial or backup content. This paper details the technical roles of PKG and RAP files, the prerequisites for installation (CFW/HFW and a package manager), and provides a step-by-step methodology for installing both unlicensed PKGs and their corresponding RAP licenses. Finally, it discusses legal and security considerations.