Editing Images

For pages that don't have a "/Images" page how do I edit or add new things? Arashi Armor[1] for example, I want to add a "Right Side" and "Left Side" since the two are different but when I press Edit it doesn't show me the images. :L

(Not sure if this notifies you but I'll put it here anyways)

In a case like that, there isn't a way to add a separate/additional left/right without having to remove the entire image template and replace it with some longer formatting. But to solve the issue of having both right and left sides shown is by combining two images into one file like this:

How does I merge them together ;A:

Just cut and paste two images onto one file using whatever you use to normally take your images.