disconnect the battery and/or coil pack and unscrew the gas cap to relieve the fuel pressure.
remove the fuel line going from the stock regulator very slowly, then the stock fuel pressure regulator (its screwed in to the fuel rail towards the front of the car and has a vacuum line going to it). install the fitting provided to where the stock fpr was located (i assume the aeromotive kit comes with fittings).
mount the new regulator to a convenient location (i bolted mine to the passenger side strut mount). connect the regulator to a vacuum source.
one line goes from the bottom of the regulator to the fuel hardline mounted on the engine mount bracket. the other line goes from the side of the regulator to the fuel rail.
-pete