Group Avatar for Organic Groups

I'm in the process of building a groups-based community site, and I'm wondering what the best way would be to allow each group (in Organic Groups) upload a group avatar that would show up on each groups home page.

The attach file option is fine, and the image shows up on the ghp, but it's not showing up in the right place. I have used views and such to theme and control the layout for the rest of the page, but I haven't managed to find the way to edit the Group Home Page header itself.

Is there a module out there that handles this specifically?