This feature list assumes the DLC is designed to integrate directly with GT5 (including the Spec 2.0 update), expanding the game without requiring a full reinstall.
In the PlayStation 3 ecosystem, a .pkg file is the standard package format for installing software, updates, and downloadable content. For Gran Turismo 5 , the DLC was distributed exclusively as PKG files (often alongside a corresponding .rap license file for activation). Unlike modern games where DLC is downloaded in-game, GT5’s extra content required manual installation of these PKG packages on jailbroken or developer consoles. Gran Turismo 5 Dlc Pkg