Sub-album and total image counts...?

Hi!

I'm using the siriux theme on gallery 2.2. It simply shows "xyz images" next to each album/sub-album, but this is simply a descendent count and includes the number of sub-albums.

I want to separate this out and show the number of child albums (total, including children of children albums) separate from the number of total images (across all sub-albums).

What is the best way to do this that does not tax php too much?

Thanks.