This is a repaint of the PMDG Boeing 737-700 in Air New Zealand's 1981 to 1996 livery.
This livery depicts ZK-NAF, which was a B737-200 originally operated by Air New Zealand from 1994 to 1999. In May 1999, this aircraft was leased to Royal Tongan. This aircraft is now in operation with Aviatsa in Honduras as HR-MRZ.
The livery is a piece of cake to install - just open up the .ptp file in the PMDG Operations Centre.