I don't know if this is possible, but I think Besthesda would't allow it, if modders creates a mod that would send data through the servers. Maybe there is somewhere a textchat app, that you can force always on top and run fallout in borderless window mode so the chat is always visible. The "downside" is, only you and your friends are able to see the chat. Just hope Bethesda will implement a chat later after release :wink: