Make sure that the particular shuttle goes to the Rental Car Facility, as there are a couple of routes. It lists the stops on the front of it.
Get on the bus/shuttle provided by the airport, no cost to you. The car rental place is about 2 miles from the airport terminal. Buses comes every 4 minutes to the terminals. Once you reach the car rental place it's very easy to get the paper work and the car which will be parked on the second floor parking. Best advice get the E-Z pass avoid tool fees, and also prepay for the gas so when you return the car you don't have to fill up the car.
You have to take a bus there, check in with counter, and go up the stairs.
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