To edit the scrolling message, edit templates, 'Forum Home Templates ? FORUMHOME'.
This is the code, and edit the bolded parts:
<table class="tborder" align="center" border="0" cellpadding="6" cellspacing="0" width="100%">
<tbody><tr>
<td class="tcat" align="center">
Notice from the ADMINS!
</td>
</tr>
</tbody><tbody id="collapseobj_forumhome_welcomepanel" style="">
<tr>
<td class="alt1" align="center" width="101%">
<marquee>
READ THE ANNOUNCEMENTS!! You could be banned if there is
something important and YOU DON'T KNOW IT!</marquee>
</td>
</tr>
</tbody>
</table><br>
I forgot to include that in the README, I am adding that right now.