It may not have been a DIY GPS procedure, probably rather a case of 'watch this'. In any case, a highly experienced pilot managed to hit the Kuta ridge well below the accepted visual MSA and landed the Twotter at Hagen with part of one wingtip sheared off and foliage buried in the leading edges of the wings. Had it been a foot or two lower it could have been fatal. Whether a dodgy GPS position played a part, is also not something I know. The guy at CASAPNG who knew most of the facts surrounding this has since passed away, so maybe what really occurred will never become public. More's the pity because there is a lot we could learn from this.
How it was suppressed from the newspapers I dunno. Perhaps the shareholding has something to do with why some operators in PNG appear to be protected species......