During June 2025, D2 Van Voo enhanced the PGM hash calculation system in the finalburnneo/FBNeo repository, focusing on improving the accuracy and compatibility of game emulation. Working primarily in C++ and leveraging skills in emulation and reverse engineering, D2 introduced new hash region definitions and multiple hash calculation types, then refactored the verification function to support these additions. This work enabled broader and more reliable ROM verification across PGM titles, reducing emulation errors and strengthening game integrity checks. The depth of the changes reflects a targeted approach to system reliability, addressing core emulation challenges within a focused development period.