Cover confusion

Hi y'all! I was watching some old manuals for the Wii, some of them have the cover of the manual as single page and then the other pages (the actual manual) as double pages (Ex. Page 1 is cover, then Page 2 and 3 are in the same image, and so and so).
I tried to do this myself but the uploader didn't let me. Is there a option or "trick" to do this? What i can do? I also want to add that have no problem uploading "single pages" manuals, but i was wondering about that.
Thanks!