Q: You already make scene caches for the image in the scene (created the sxwu workspace file). Now that I have added an image dataset, I want to open it with the previous caches. Do I have to recreate the scene caches?

A: There is no need to make scene again, and you only need to make caches for the image datasets. Then open the sxwu workspace. Add the image cache layer in the layer. Finally save the scene and workspace.