That might be what the embassy reccomends, but we simply present our passport, DL, and credit card at the rental counter and we are on our way. I would suggest having a photocopy of your DL and passport in the event of a fender bender etc. as the police need something to identify you & to file a report in the event of a problem ( though calling your rental company should be sufficient if you're unlucky enough to need to do so ).

Curious as to who the OP is renting from since you're using two vehicles. Carjet is a consolidator who can get you good prices at AGP ( assuming that you can drive a stick ).

Barry