You will need the game disc image. Ensure you are downloading the version that includes the English patch if you are getting the Japanese Accel files.
If you are looking to download and play this "missing" chapter on your PC or original hardware, here is everything you need to know. What is Naruto Ultimate Ninja 6? Download Game Ps2 Naruto Shippuden Ultimate Ninja 6
Equip different ultimate techniques for your favorite shinobi. You will need the game disc image
You must have a PlayStation 2 BIOS file to boot the emulator. 2. Installation Steps Install PCSX2 on your computer. Place your BIOS file in the emulator's 'bios' folder. Download Game Ps2 Naruto Shippuden Ultimate Ninja 6