As none of us know these system, i've been gathering some information from the local people who have connections to this concern.
The answer i received is very complicated however it seems that those islands that are going under Holland may will encounter problems with their medical schools as the dutch system does not recognize any foreign medical school.
As for Aruba, Curacao and St.Martin this will remain status quo for medival schools.

The most interesting question that came up thru the locals with concern to the accreditation problem was that why are all the foreign medical schools using the american curriculum and doing USMLI, isn't this because most or all students when their finished want to work in the US?
Who wants to work in one the caribbean islands like Antigua,St.Kitts, Saba, Dominica etc.?
So why are you worry about the accreditation if you have to do all USMLI's anyhow?

To tell you the truth these locals were right, we all want to practice in the US and to do this we have to sit for all the USMLI's.
Having a school accreditted by a local government will not help anyone with a free ride into the US system.