Remove group admin avatar, and send invites.

Hi there

I'm hoping this is a really simple question for someone.

I've got the BP-scholar theme running. I'm looking to remove the group admin avatar from this page...
my page so that it only shows the group image. My Buddy press is going to be limited so that only site admin can set up groups - so the avatar for group admin isn't needed.

I'm just not sure which file I need to be ammending, and to save me searching about for hours, I was hoping someone could point me in the right direction!

Also, when I set up the group I didn't seem to have a tab to send invites to the group, is there a setting somewhere in buddypress that I might have missed?