It shouldn't be too hard to do, im not sure where the cars central locking box is located but if you remove the connections from that and connect them to your box it should work. The only thing really that may be different is if there are master actuators (when you lock/unlock drivers door that master actuator tells other doors to lock/unlock also). Im not familiar with the R32 setup but doing it this way the car like some others may give a warning honk to say doors did not lock correctly due to the actuators not being in communication. Simple trial and error shouldn't take long.
From memory actuators are 2 wire and masters are 3 wires.
Hope that may have been of some help