About included VAEs for AUTOMATIC1111
Hey! So, no, VAE files go in the
stable-diffusion-webui/models/VAE folder only, and then you can select them from the VAE drop-down in Settings.
Also, if you want a VAE to be automatically loaded when loading a model, name your VAE the same as the model it's associated with, and choose Automatic in the VAE drop down.
Otherwise just set the VAE manually when changing models.