The only part of the 2006 South Island steam trip I didn't join, was the run from Dunedin to Invercargill. This was due to it being seriously popular. All is not lost; here's a link to a very nice shot taken on that outing, posted on the Flickr photo sharing site.

http://www.flickr.com/photos/southspeed/677761536/in/set-72157600582328892/

The engine is Ja class 1271. I travelled from Dunedin to Christchurch behind this impressive machine, double-heading with a similar Jb class engine. 1271 also hauled our train over the mountains on the Trans Alpine line.