hi
the code remains the same since zenphoto 1.4.6.
you can see the result here: http://test.vincentbourganel.fr/pages/map/
and of course, my tip describes how to create a specific page with all geotaggued pictures of the gallery.
but you have nothing to do in albums pages: the theme manage googlemap plugin and osm plugin.
a starting point, before making a dedicated page, is to enable the googlemap plugin and to see it in action in an album page with geotaggued pictures.
if it works well, to create the dynamic album with the relevant search, and then see it in album page.
last, create the page with the provided code.