I did some snooping around the Help board and found that Proboards allows CSS coding. The few pages I found that owners redesigned using CSS coding looked great.
Here's the definition of what CSS means:
Short for Cascading Style Sheets, a new feature being added to HTML that gives both Web site developers and users more control over how pages are displayed. With CSS, designers and users can create style sheets that define how different elements, such as headers and links, appear. These style sheets can then be applied to any Web page.
The term cascading derives from the fact that multiple style sheets can be applied to the same Web page.
I use Multiply message boards which allows board managers to redesign their pages by changing backgrounds and adding graphics. I redesigned my home page using pre made CSS codes. Here is an example of what a CSS code would look like.
<center><a href="http://www.JellyMuffin.com/images/holidays/christmas/"><img src="http://images.jellymuffin.com/images/holidays/christmas/images/100.gif" alt="JellyMuffin.com - The place for profile layouts, flash generators, glitter graphics, backgrounds and codes" border=0></a><br><a href="http://www.JellyMuffin.com/images/holidays/christmas/" target="_blank">Graphics for christmas Comments</a></center>
This is what the above code would look like on your page: