Myspace forum

Hi There What I need is a forum what I can integrate into my site. A good example is the myspace forum. So this is what I need: The size of the forum can be no larger than 800px in Width and the design can be very similar to the one off myspace, but what I need to do is connect the forum to my user accounts. So all the messages need to capture my users details and add them to the database, so they show on the message board as normal. I don't want the forum to have a login facility because the user will be already be logged into the system to access the full functionality of the forum. Plus I will be adding session scripts to the pages. So I will need to know where to add them. Then finally, I need a backend to manage the rooms etc. Thanks Scott