Personally, I would not recommened to use the cloud images. You can get much better results directly in Vue.

However, if you want to try, you can use your photos directly in in Vue by selecting the camera and then selecting the "Backdrop" button (in camera options). There you can set your image as a backdrop. You probably need to also select "ignore atmosphere", otherwise it will look funky. Note that the photos need to be of very high resolution to be truly usefull, otherwise the background will look pixelated in any decent size render. You also need to carefully match the lighting in the scene to the cloud image.

Ciao

TD