Have already tried that on the TP discord.
The answer was "I don't think any of the duel terminal stuff is open source, and I don't think there's any motivation by the person who added it to support the older versions or else he would have".
So that's going to be fun.
From what I have found:
It could be possible to play older DT sets on TP. I have been able to mix up the images and textures from the JP version on the US version, but it always crashes when displaying some images.
By doing some research, the only thing that we would need to patch are the dynamic paths to those textures and files.
What I guess we would need:
On the openparrot github, there was a video that showed how to add support for a new game using an already working game config files. So that would be perfect for this situation... But, the video is no longer available. I have been searching through the forums but haven't been able to find anything related to it.