There appear to be two ways of doing this:
- WP2G plugin
This way is supposed to be quick and painless, but I found it was pretty much the other way. Lots of things you need to do to get initially setup, and does not integrate well with themes that are not specifically designed for it1. Overall, a lot of effort.
- use an iframe
Ok, not XHTML strict compaitible, so you could use the object tag2, but this does allow the gallery to work flawlessly without any fuss, apart from long pages causing scroll bars. The gallery was embedded in a page using the template system, and is currently hard coded. This isn’t perfect, but it works.