The strange one blip for drivers door, two blips for passenger door set up has irritated me since I bought the car.
I always forget, we walk up to the car, I blip the key fob, jump in, and then see my girlfriend pulling at the passenger handle and tapping on the window, I found a mention of how to change this on an old thread yesterday, but couldn't find any mention in the handbook.
Anyway I tried what i'd seen on the thread and bingo!!
Very easy, unlock car, hold both remote buttons down together for around 10 secs and it then becomes operative

both the doors and the boot lid now unlock with one blip.