How to change the background of an DMG Software License Agreement dialog?

When I create my own dmg-images, I always attach a software license agreement to them. When I opened the flattened image, I always got the Jaguar "X" in the background of the agreement dialog, where I have to confirm to the SLA before the image will be mounted. I believe that since Lion, apple removed that, so the eula-dialog is clean.

Is it possible to set a custom image into the SLA-Dialog on Lion or later OS X?

Solution 1:

One easy way to create DMGs and play with every option is to use the popular DropDMG from Michael Tsai. It's not free, but he has great support and it's very communicative and there's a trial version.

_{Disclaimer: I'm not affiliated with Michael Tsai, but I've known him (and his products) for a long time now, when I started using SpamSieve (another of his great products).}