Welcome to HBGames, a leading amateur game development forum and Discord server. All are welcome, and amongst our ranks you will find experts in their field from all aspects of video game design and development.
The sprite is a Sprite sprite, not RPG::Sprite.
From the people I've been talking too, it looks like there's no way to do what I want to do. It looks like I'll have to script my own Advanced Animation script.
DeM0nFire, Sprite is the parent class of RPG::Sprite. Just replace "Sprite" with "RPG::Sprite" and it will work the same way, with added functions, including animation. No need to reinvent the wheel...