Images in HTML are loaded in the order that they are located in the web page file.
I suppose that you could use a placeholder in all of the HTML image tags and then use a preload script that you could order however you want. Then onload you would change all the HTML images SRC to the right picture in any order you wanted. The apparent load time would be longer because of the js to change all the image tags. But then people with js disabled would see a whole lot of nothing.