banner groups

Hello everyone! Is it possible to display the banner of the primary user group under the usertitle in the "sidebar_online_staff"? Generaly: How can i call the banner of the primary user group? Big thanks in advance!

Hey, I've been looking for a long time. I'm really new to xenforo, so this is a learning curve. I found a few threads but all the code is out-dated. Is there a thread or a tutorial that is for 1.5+ that explains how to add Custom image banners like here; That is from a xenforo forum...