cusimar9 what you have here are cube faces that are ready to be displayed as a panorama. They were already stitched into a panorama. You can display it using a cubic panorama viewer, or you can use a program like pano2vr to reproject it to an equirectangular image (a bad idea, since reprojecting this will decrease quality) or to combine the 6 cube faces into a flash or quicktime pano viewer.
Here is an example I made using pano2vr. I didnt stitch anything, I used the unmodified images that you gave.