Have a look at this website

it may shed some light on in, as far as insurance is concerned the family will need to add you as an additional driver to their policy, insurance is taken out in the country of origin.

Hope that helps

Hi caznpete.
Miss P is correct.
I have driven in other countries, including the UK (where I am regarded as a foreign resident) and friends and family have had me included on their policies. I have never been asked for a green card, in the past a green card was issued to enable you to drive your own car abroad. The insurance company may want to see a copy of your driving licence so don't forget to take it with you. Ask your family to contact their ins. company to find out what their requirements are.