You need the USA or PAL version of Yu-Gi-Oh! Forbidden Memories (CRC: 7D0E6D9D for USA). Do not use a "Greatest Hits" version, as the mod is patched for the original black-label release.
The headline figure of this modding scene is often "722 Cards." Technically, this number reflects the total card index the original game code could support. In the unmodded 2002 release, this roster was bogged down by "vanilla" monsters with zero effect utility and a limited pool of Magic and Trap cards that made high-attack brute force the only viable strategy. yu-gi-oh forbidden memories mod 722 cards