I doesn’t say in your post much about experience, so i would assume you know what your doing, i which case register with the DMQ, pay your dues.
They will issue you with contacts for AWs (Approved Witness), go out with them stalk and shoot a deer in season on his or your ground, answer some questions relevant to deer stalking, The portfolio goes to an assessor he or she will give you a ring and ask some more relevant questions.
May i ask why you need?
I happen to think its a good thing to do if you want to.