This badly needs to be ported to Drupal 7. Barlow used to "support the latest 3 Drupal releases", but now we ditched 4.7 (at last!) and we're down to two. Not good enough!

One way I am thinking of doing this is to port it to Zen, by creating a subtheme based on Zen, which should make future upgrades easier.

Otherwise we need to follow the very long upgrade guide, I am not sure that it is worth it.