under the UV image editing panel in blender, there is a menu with the option to 'consolidate into one image' you click that and set the size of the one image. its very simple, you will have to select all of the pieces you want to merge the images with first.
note: i think the twins would be use full because, without their head, they would make a basic ocarina of time style body, so if you wanted to make a character in the ocarina of time style, you could use this as a base
note: i think the twins would be use full because, without their head, they would make a basic ocarina of time style body, so if you wanted to make a character in the ocarina of time style, you could use this as a base