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The short answer is that it has been done to NS models, but not necessarily the NT.
It is being done with a replacement pipe in place of the DPF assembly and an associated aftermarket ECU controller.
The modifications which I know about have been done by Chipit.com.au
They should be fairly robust in terms of reliability etc but you are moving away from how the vehicle was intended to perform so there is always an element of risk associated with such modifications, however the pajeroclub australian forum would be the place to ask whether the success rate is high enough for you to want to do the modification...
All the best