Hi there!
Great, HUGE work again, many thanx. A little note though. ZtBAE was not Public Domain nor free. It was actually sold in a way very similar to the first computer games in the late 70s and early 80s in the States, where the developers sold plain disks in plastic bags hand-to-hand thru electronic's stores. I think Richard Garriott made his first little fortune by selling his first games this way.
Actually, this is also how Megablasters was being disrtibuted everywhere but in the UK.
So, the game was not allowed to freely copy, hense the "finger printer" owner ID and the serial number.
regards,
rb