While I can't say with 100% certainty, I'm afraid that I don't think it's been done :(
I know that some people have looked into mildly editing the Mystery Dungeon games in areas such as text and general info like this, but I don't think anyone's really looked into Red Rescue Team, sadly!
Also, when responding to VMs, be sure to click "View Conversation" before typing and sending your reply, otherwise the message won't go to the other person's page and they won't see it! ;)