You will need to first remove the steering knuckle:
Next, with steering knuckle removed, you will need to press the hub from the knuckle assembly. Next, remove inner and outer grease seals. Remove inner and outer snap rings from knuckle(snap ring pliers are needed for this- $15 at most parts stores). Then press the wheel bearing from knuckle.
Install new bearing in reverse procedure.
Here are torque specs:
It has been awhile since I have done one, but if memory serves me it is either 32 or 34 mm nut...