Provided you have an access hatch in the boot to the pump, then yes, it is simple enough. Just mark the 4 pipes so you know which order they go back in.
Once you've fitted it, it should be ok, but you can purge the system by putting the ignition key into position II and stepping on the throttle pedal 5 times. The check engine light will come on and the pump will operate a bleed cycle 4 or 5 times ensuring the system is free of any air.