If you're specifically interested in a guide related to an exclusive Japanese ROM ISO of "World Soccer Winning Eleven 10", the process would involve:

Have you played the Japanese version? Let me know how it compares to your memory of PES 6 below.

The Japanese version includes several "exclusive" elements not found in standard Western counterparts: WE 10 v PES 6 What are the differences? - Evo-Web

The Japanese ROM ISO version of Winning Eleven 10 is a rare and exclusive soccer gaming experience that offers a unique blend of realistic gameplay, authentic features, and nostalgic value. For collectors, enthusiasts, and Japanese players, this version is a coveted find that provides a distinctive gaming experience. If you're interested in experiencing the game, be sure to research reputable sources for downloading the ISO file and using a compatible emulator or PS2 console.