There was a talk at Apricot this afternoon that might be of interest to folks in PNG and the Pacific. I'm sure the video and slides will be available soon if you missed it.
The talk was on "IP Flexalgo". It provides a coarse grain traffic engineering solution that doesn't require MPLS and just uses the IGP to engineer traffic paths.
One of the potential use cases where it might make sense in the Pacific is routing latency insensitive traffic via a cheaper satellite path if you are trying to balance use of both submarine fibre and satellite. For example, you could set up routing for a cache fill so that it prefers the satellite path while other traffic takes the submarine fibre (also applicable if you have access to different satellite technologies with different characteristics).
Also if you have a backup path that doesn't have the same capacity as the primary path you could engineer it so some routes don't have access to the secondary path in case of a failure of the primary.
It is currently at Internet draft stage (authors from Juniper and Cisco) so it's not clear when it will make it to production code but it's possibly something to watch out for (or discuss with your vendor) if it's of interest.