1.8T o2 sensor

i have a 2000 1.8T i need to change the o2 sensor after the catalytic converter, i bought the sensor, but looks like a pain to get too.. i was wondering if anyone has changed this and what they had to do, stubby wrench, or if i should buy a 02 socket, but doesnt look like i can get a ratchet on it because its so tight.. any help? thanks..