How could I set a BuddyPress cover image as sub-site theme header?

Although I am not developing a typical BuddyPress community site, I am trying to have the theme of the subsites actually look like a community site. It had been recommended that I try BuddyPress as a solution for custom meta fields which I am testing out.

With BuddyPress, you can now add your own coverpage with the Profile image similar to Facebook. I can see that this would be very confusing unless it matched the header of the sub-site.

How could I have the BuddyPress coverpage also be the header for the sub-sites Theme?

I am using Pro Sites and New Blog Templates