Great work! I'm the guy that's working on recompiling the iPod games for modern systems (I'm mentioned by the top comment in your Reddit post). Have you tried installing the games in the emulator? If so, this would be a huge step in figuring out the DRM so people can dump their own games. That would lead to more games being supported in siggifly's 5.5G emulator [1] and eventually the games can be brought to more modern platforms.

[1] https://github.com/siggifly/ipod-emulator/ I made the PR that allowed it to run dumped games fwiw