Use Vortex or Mod Organizer 2 (MO2) . Dragging and dropping files manually into the "Data" folder is not recommended.
Since JCalin is a private creator, the "install" files are generally hosted on: jcalin giantess install
To successfully "install" JCalin’s giantess content, the secret is . Whether it’s a VaM scene or a Skyrim mod, the giantess asset is usually just the "skin." You need the underlying skeleton, physics engine, and scale scripts to make the experience work as intended. Use Vortex or Mod Organizer 2 (MO2)