Creating custom avatars and clothes by modifying RPM Characters

I want to be able to add more customization beyond the RPM Web Avatar Creator. I actually have a bunch of related questions.

1 - Can I export the character models to Maya or Zbrush to help further individualize their features? Let’s say your editor is close but can I shape them even better to increase the resemblance or likeness to how I want?

2- How can I take an avatar I already created and duplicate them so I can change their clothes?

3- Can I make a character that is in their underwear so that I can then create and implement my own custom clothes for them? The same goes for hairstyles as well.

4- Will the New Ready Player Zero characters and look ever be available to us to implement in our apps and games?