*Sigh - how do I put this...*
I don't need to do anything, actually. I've already 'wasted my time' (as you so quaintly put it) with an RSA ATPL flying for aid organisations throughout Africa for over two years - I guess all those people I flew for must have overlooked the fact that my licence was, in fact, worthless. It was fun, but it's over now.
SA licences are, in my experience, universally accepted by any quality outfit on contract to aid organisations.