Personal Messaging [User Systems]

[IMole]

Ok, I downloaded the Froobe V2 user system but it's only got register and login etc, it's very good, but what I would like on it is Personal Messaging and editing details script if any one can make?

The site I've put user system on is:
http://saturdayhabbo1.freehostia.com/usersystem/index.php

I hope you can help :S