AFAIK digital servos work with the Servo library just like analog servos. The "digital" stuff is inside the servo.
You can use any of the Arduino I/O pins to control a servo with the Servo library. Use the Servo sweep example that comes with the Arduino IDE for a test program.
analogWrite() is used with a suitable h-bridge driver for controlling the speed of DC motors - it is not used with servos.
...R