At the ISPS New Zealand conference in Wellington this year, there was an excellent presentation from a team at Starship Child and Famil Unit. In this presentation they shared the results from the Hearing Voices Support Groups they have been running with Debra Lampshire.
It was an interesting Power point presentation, and I see that ISPS New Zealand have loaded it on to their website.
You can see a brief review of the conference and the Powerpoint for the support group on the ISPS site here
It is titled Hearing Voices Group for Hospitalised young people