Rossair,
I'm not sure if this has been superceeded so as far as I am aware, this is the definitive CRM training aid. The trouble is it is very pricey. I was lucky enough to be lent a copy whilst I was doing my PPL and the central message has struck a chord with me.
The person I borrowed it off was doing a team building related training course; totally non-flying related.
http://www.parthenon.uk.com/aviation/itm00438.htm