if you take out the bulb it will disable the passenger side.
The way i did it was to cut the wires for the airbag and solder on a resistor bought from maplins. cost like 20p and that will make the car think the bag is still there and no light will appear.
the resistor valuse you need is 2.7 ohms
once light has appeared though you will need to reset the airbag light by pressing the door light switch 7 times in 5 secs with igntion on with light on the dash on and then turning off ignition and you will be sorted.
I have done this precedure myself and was simple enough, hope that helps