Hey, I'm using NGG, 2 galleries, each gallery in their respective album. These albums are then called for on my photos page using the short codes: [album id=1 template=compact] [album id=2 template=compact].
This displays thumbnails to both the albums, but displays them one under the other rather than side by side. (Take a look: http://www.cheambaptist.org/bb/photos)
On your website [http://nextgen.boelinger.com/album/ - specifically here] Alex you seem to be able to achieve the side by side effect.
I've seen a very similar post here but I couldn't gain anything particularly helpful from it, I also think it more likely that this topic will be seen rather than a reply to and older topic.