I used Midnight Commander to scan the file, and could detect some characters by eye.
I found the Tux Much visual by poking at random places and restarting the player...
I wish I had seen the data at the end of the file sooner (ASCII view in midnight commander doesn't show it?), it would have been much easier...
I certainly do not want to modify the fonts though. As you said, it would be an immense work to complete...

Frank van Gestel