You need a "clean" (unmodified) PAL or NTSC version of the original game file.
Finally, the disc was ready. He popped it into his "chipped" PS2. The console groaned, the laser clicking as it struggled to read the modified data. The screen stayed black for a terrifying five seconds. Then, the Konami logo appeared, but instead of the stock music, a heavy rock anthem blasted through the speakers—the modder’s custom intro.