Instead of containing a specific game, the Placeholder application is designed to look for a generic PS2 ISO file (usually named ISO.BIN.ENC ) stored on the console's hard drive. When the user launches the Placeholder, the PS3 thinks it is launching a legitimate PS2 Classic, but it actually loads the ISO file the user placed there. This allows users to play their own PS2 game backups without repackaging them into a custom PKG for every single title.
A USB flash drive formatted to the FAT32 file system is required for the PS3 to read the activation files.
I tested this file three ways:
Click on the PS2 Classics Placeholder package to install it. Step 4: Activating the RAP File
Most PS3 titles require a unique RAP tied to your console ID (IDPS). However, the PS2 Classics emulator—an application named ps2_netemu.self —does not check for a console-specific license. Instead, it checks for the existence of a valid license file in the exdata folder. Modders discovered that a single, static RAP file could unlock every single PS2 Classic PKG . Ps2 Classics Placeholder Rap File
For a homebrew user wanting to play their own PS2 ISOs on a PS3, this was a nightmare. You couldn't just "copy and paste" a game. The system expected a paid license to decrypt the data. Without that license, the game was gibberish to the console.
The PS3 looks for licenses in a specific location on your USB drive. Format your USB drive to . Instead of containing a specific game, the Placeholder
"Press start, load the disc, here we go again / Memory card full, gotta save my friends / No CD, no DVD, just a raw ISO / OPL booting slow, man, I need a pro / Polygon hands, texture tear / This ain't a game, this is a placeholder here / Drag and drop, FTP, crossbar scroll / Welcome to the Classics, now gimme your soul."
The is a homebrew utility designed to exploit this system. It acts as a "dummy" PS2 Classics title installed on the PS3 XMB (XrossMediaBar). A USB flash drive formatted to the FAT32