Is it possible to add custom XTTS voice? Or Piper?

[JohnF51]

I have trained Piper and XTTS models for my language. Would it be possible to add a feature to add my own model? I tried rewriting the XTTS model.pth files and similar, but the program still recognizes them under their IDs, and if it is not the default one, it rewrites it with the downloaded file. Is there any way to get around this? Does anyone know how to do this? By the way, it's a beautiful megaproject. Thank you to the creators for their hard and laborious work. Great job.