Good luck using a press to get your carrier bearings off - if you are just planning on doing the pinion bearing, then I guess that's not a problem. If you do plan on replacing the carrier bearings, you may have to use a grinder to cut them off. Use the grinder to cut the cage and them remove it and the bearings. Then use the grinder very carefully and start to cut through the bearing left on the carrier - you will have to cut it at about a 45 degree angle and just be careful you don't nick the carrier. Once you are about as deep as you dare go, take a chisel with a fairly wide tip and place that in the groove you just made with the grinder. Whack it with a hammer and the bearing should split and you can slide it off - the tip of the chisel should not bottom out in your groove if you get what I mean.
When you are installing the new bearings, use an old bearing without a cage or bearings so when you install the new bearings, you aren't putting pressure on the cage/roller bearings with the press.
Hope that makes some sense.