Quote Originally Posted by dvtalk View Post
Thanks for pointing me to the right direction. After updating the DPU, adding back the <div id="productMainImage"> to the tpl_modules_main_product_image.php that the theme authors have omitted, and installing the Attribute image plugin, it is finally working!
Glad that worked out. Yeah, I had considered adding a field to the configuration to support use of an alternate id field, but had been working to make improvements in some relative steps.

If you have the "time" I would suggest comparing other template files for that template to see what, if anything else, is missing. Of course it will be affected by the associated css, so keep that in mind as you go along.