HTML Code:
<br /> <div class="sidebox"> <div class="boxhead"> <h2>My HEADING</h2> </div> <div class="boxbody"> MY TEXT </div> </div>
Replace 'MY HEADING' and 'MY TEXT' with the relevant contents for the box. Alternatively, you could create variables (Design | Library | Variables tab) for these items and enter the data in the appropriate field in the interface.