Take it from a guy who has removed hundreds of windshields!!! Dont risk a good glass that you'll have trouble finding a replacement for!!!.
Yes removing it can be done with the proper tools and lots of care and patience. But a seal is cheap, cut it with a razor knife, use a solution of soap and water to make the blade slide easier and this will also loosen the seal from the channel. Push with the palm of your hand not the heel and ease it out.
Installation is easiest with the rope method. 1/4 or 3/16 nylon rope is best and loads of soap. Rap the rope in the seal channel on the rubber and cross them at the bottom. Set the glass in the channel and pull the rope around ,working from side to side til you meet at the top.