I'm not sure where the 'official' came in. That's the RAAF Museum; photos by a recent visitor, not official photos of the museum.
The Official website for the RAAF Museum is here:
http://www.defence.gov.au/RAAF/raafmuseum/
Tom, both those schemes and setups are correct and genuine for the aircraft. The 'A-20' is a Douglas Boston used with the gun nose by the RAAF - yup, that actual one. Originally ordered by the French, Hitler got to Paris first, so they were taken on by the RAF, diverted to the Dutch East Indies, but Tojo turned up, so the RAAF took them, third-hand before being uncrated! and gladly. An RAAF VC was won by a Boston pilot.
Boston:
http://www.defence.gov.au/RAAF/raafmuse ... boston.htm
Newton, VC.
http://www.awm.gov.au/people/658.asp
The PBY is an ex Canso representing a particularly historic RAAF Catalina.
http://www.defence.gov.au/RAAF/raafmuse ... talina.htm