It's really quite easy. Just put any objects that you want to be dynamically loaded into vram onto another layout and make the objects global.
Run the "Layout 1" layout and watch the vram usage.
1,q to create and destroy the oval bg.
2,w to create and destroy the rectangle bg.
In contrast run the "Textures" layout and see how even though both bgs are destroyed the vram usage remains 4 MB.
cap req. 0.99.84