If you're interested in the Mini-DVD concept, you will most certainly want to check out a Mini-DVD image created using Scenarist. When burnt on a DVD-R the image plays on all standalone DVD-players. When burnt on CD-R or CD-RW it works with most PC software players, and DXR2 and H+ decoders.
You can download the image here, and burn it using Nero as FOREIGN image, Mode-1 2048. The image is 5MB in size, and features the standard THX trailer. The image is provided by a third party service.