Yes, the servo library is your friend. Basically the Electronic Speed Control acts like any servo you connect to your RC-receiver.
In the Servo library you can either set the values as degree (0-180) or as µs impulse duration going from 1000µs to 2000µs with 1500µs being the middle. I prefer the µs values as those undergo less transformations. The degree will internally converted to µs. When you all attach, it's a good idea to set the limits, in your case 1000 and 2000.
If you use the call attach(...), the servo will go to the middle position 1500µs. If you don't like this, set the servo to the desired original position (eg 1000µs for off in case of airplanes) before calling attach.
For your ESC, you might need to calibrate it first by setting it to various positions. Don't forget to do this, otherwise the ESC will calibrate itself to values you don't intend and behave strangely. There was recently a thread here on the boards about this.
Korman