how'd they pay for the cab?
You remember the scene when Abby and Neil took a cab? Since they had turned all their cash and credit cards over to Pierce Brosnan earlier in the film, how did they pay the driver? You'll remember when they got to their destination, they just got out and walked straight into the building, no effort to pay at all. That must have been one understanding cabbie.
Unless I hear a good explanation from somebody, I'm going to assume that this small point was just another bit of silliness among dozens of silly situations in an outrageously silly film.