How do you change the bulb in the dome light of a 1995 Ford Windstar?

The bulb(s) in the dome light do not come on when we open the doors, so we bought bulbs for it. However, now we can't figure out how to get the plastic part off the dome light to change the bulb. Is there a special way to do this, or do you just pry it off and try not to break the plastic cover or anything else?How do you change the bulb in the dome light of a 1995 Ford Windstar?there is a slot on the sides you pry it off with a screwdriver it shouldnt break but be carefull