title: Magento API: How can I assign an image to multiple products without re-uploading
body: <p>The sites I work on (Magento 1.5 and 1.6) currently use a script that manually places images and then associates them using MySQL queries.  I'm tasked with trying to move to an API-centric method so as to streamline things and integrate with other processes, and to move away from direct database manipulation (in case fields change and such).<br>
  The way our products are structured, we have a configurable item, which then has simple items for each color/size combination it's available in.  For each color, there's only one set of images needed, regardless of size.  </p>
  
  <p>Example:
  Product A is a configurable product, with six associated simple products representing its two colors, black and red, with small, medium, and large sizes on each. Let's say I upload a set of images for red in size medium.  I want to then use those same images for red in size small and large, not re-upload.  Same process for the black one.</p>
  
  <p>As it stands, it looks like I'd have to upload the image for each simple product.  Is there any way to do what I want, or will I have to have stick with the old method?</p>