How many outputs can you control with EZB on Arduino Mega?

The board has 53 outputs but it seems EZB only lets me use dropdown selections for 23. This cant be right. I 3D printed Johnny 5's head from Short Circuit the movie. all the servos, LEDs, relays, and sound files use 39 outputs. What am I doing wrong? Someone please help. I don't have any room for another Arduino board and to take up another communication port.