A carefully thought out plan of action indicates the need for one
If you dream of reading - or acting out - a script, you are experiencing feelings of insecurity. You need rules and routine, because you feel a lack of security regarding social affairs. Try to take more chances and push yourself to be all that you can be in real life.
If you dream of a script, then your subconscious mind is helping you to realize that you are the writer of this play/movie called your life, and that the power to change your life script is always in your hands. See Write and Play.