For removing the old wheel bearing races, they can be driven out from opposite side of hub with long punch/rod. There is usually a couple of notches to get to back side of race. For driving the new wheel bearing races I take old race to grinder and cut it down just enough so it will slide into hub. Then use a block of wood laid across new race, drive evenly in till flush, once flush carefully put old modified race on top of new race and drive rest of way. useing this method spreads the impact around full race face and prevents damage from localized impact. Of course a proper race driver works also.

P.S.
Make sure you put the race in facing right way. Trying to get one out you put in backwards is real PITA, trust me.