Simple unregistered_welcome hack

[NexDog]

We are developing a new support site and I have a question about the message that is shown to unregistered surfers. First take a look:

http://www.nexusportal.net/index.php

You will see the panel on the left with Register for free! That is contained within the forumhome_unregmessage template. What we want is for the member info below it not to show to unregistered users. At the moment, I just put $unregwelcomemessage variable above the Member Info tables. Also, the unregistered meesage needs to be hidden from members. How do I do this? Does this require hacking of the code and if so what and where?

You can also login with user: Test and pass: vborg

Thanks for your help but please remember the site is not finished. It's looking great but will be so nice when it's finished.