I am not up on the scriptures so perhaps you can point me at a religious edict saying what should happen to the deceased when they shuffle off.....?

I've already linked the response to that. But just in case you chose not to read:
In 1963, the Vatican said burial of deceased bodies should be the norm, but cremation is not "opposed per se to the Christian religion." Catholic funeral rites should not be denied to those who had asked to be cremated, the church said.

But in recent years, "new ideas" contrary to the Catholic faith have become widespread, the Vatican said. The new statement names pantheism (the worship of nature), naturalism (the idea that all truths are derived from nature, not religion) and nihilism (a deep skepticism about all received truths) as particularly problematic. If cremation is chosen for any of those reasons, the deceased should not receive a Catholic burial, the new guidelines say.

So the objection is to a 'mix 'n' match' cremation where decisions on the reason for cremation are against the teachings of Catholicism.