If you are looking to modify your characters extensively, the community typically uses these more modern and documented alternatives: Illusion Wizzard
For a game as notoriously complex and visually dated as Artificial Girl 3 (AG3), the community tools are often more important than the base game itself. The is arguably the most critical utility in the AG3 modding ecosystem. While the game’s default character creator offers a decent baseline, the Illusion Morpher is what allows players to break the boundaries of the game's standard anatomy and create truly unique (or wildly fantastical) characters. Artificial Girl 3 Illusion Morpher