I am in the midst of this job for the first time as well, so my suggestions aren't proven. I have the knuckle off the car (not too difficult to take off, but don't break the pinch bolt like I did-ouch). I am planning to use a press to put the bearings back in. I have heard that a 2" metal conduit coupling is just right to contact the outer race. I couldn't find a metal one the right size at Lowes, but a PVC one is the right size. I thought the PVC might hold up to a press, but I'm unsure about whether it would hold up to banging. Interestingly, a 1" pipe just fits inside the inner race, and with a reducer coupler you might be able to make a tool to hold the bearing while tapping it. I plan to post on the message board if I have great results - we'll see.
Matt