I just wasted a couple hours with DropDMG who's author should be credited with the worst documentation ever who seems ever. Apparently his thing is to affect a custom icon, not a background image. Attempting to apply diverse half baked how to's never worked. This is ridiculous.
Is there any *WORKING* solution to assign a background image to a DMG ?
I found an announcement of FlashDMG from Dave Sisemore in the old forum, but I could not find it anywhere on his page. Dave, if you are here, do you still sell that ? I will gladly buy.
I saw you posted snippets, but frankly I rather buy an app than waste yet more time inferring things.