How to publish a DNG wrapped resource

Essentially, I have a picture that was created a PowerPoint drawing, and I've uploaded the .pptx file to DNG and inserted it into a module.  Now I need to publish the module, including the DNG wrapped resource.  

I've tried using wrappedResourceImageURI to publish the preview image, and this works, BUT the preview that DNG generated isn't completely faithful to the uploaded object.  (The person who originally created it seems to have done something silly and used the "Title Slide" layout, but then instead of deleting both text boxes they repurposed the bottom one.  They moved it, resized it, and made its text left justified.  Unfortunately, the preview that DNG generates for this box isn't respecting the left justify setting and is instead centering it, so it's causing the item to be misaligned.  It's dumb and I could fix it, but this is the sort of thing that's very likely to reoccur in other files.  Plus if the preview is ignoring some settings, I don't if it'll ignore any other settings too.)

Because of this I'm trying to figure out how to insert the actual object into the document instead of using the preview, but I can't figure out how to use wrappedResourceURI to do this. I've tried a number of things, but without any success.  I've seen a bunch of "unrecognized file format" types of errors.  I see that RPE downloads the file from DNG, but it names it with a random-ish name and a .tmp extension, so I don't know how to do anything with it.

Thanks.