Hi Jon,
It's possible to add feature in CDSEO to generate products images for google webmaster tools submission ?
I have just installed CDN on my site & found that all google images search results has been gone
!!
After googling I found that one has to submit sitemap with images to regain quickly in google images search result.
wordpress & many other ecommerce software has got addon for such but not available for x-cart.
In images site map event though you mention images url like
https://cdn.mysite.com/images/product_image.jpg then still google accept this if you have verified your cdn sub domain ownership webmaster tools.