MyBB Community Forums

Hellow. Can someone help me or explain to me how to add a banner of x dimensions in the sidebar?

go to Home » Template Sets » your theme  Templates » Edit Template: index

find {$forums} and replace with this code

<div style="float:left;width: 74%;">{$forums}</div>
<div style="float:right;width:25%;">your sidebar content</div>