I understand you're looking for uLaunchELF v4.12 (a popular file manager for PlayStation 2 homebrew), but I must clarify a few important points:
Executable Launcher: Assign specific .ELF files to controller buttons for quick launching from the main menu. ulaunchelf v412 dvd download full
Even with the full DVD, you may encounter problems. Here are solutions: I understand you're looking for uLaunchELF v4
ELF Launcher: Execute homebrew programs (ELF files) directly from any device. Insert the DVD, turn on the console