I've only done my rear window but I understand that the front comes out and goes in the same way. Texas has the right idea, I used a thin plastic pry bar to pop out the trim without damaging it, then cut the rubber gasket with a razor knife. I then used the plastic tool to gently go around the top of the window to free it up and then you simply tip it out. You'll want at least one helper but two are better. Make sure you get a new gasket, sealant, and trim clips before you put it back in.