Arduino as a component in a Eagle/Altium design

Hi,

I'm doing the schematic of a board where i'm going to connect Arduino with some sensors and with other development systems. My question is, is it possible to use Arduino as a component in Eagle or in Altium? I don't need to see what is inside my Arduino Board (Arduino Mega 2560), i just want to use the layout to access the connection pins.

Thanks for your help!

The Arduino schematics and Eagle files are published (http://arduino.cc/en/Main/Hardware).

It sounds like what you should be designing is a shield that plugs into the Arduino.

Thanks for your answer. I've been working with the eagle files that are available in the Arduino site and they are really great. But as you have mentioned, a shield that plugs-in into Arduino will be a great solution. Do you know any existing libraries with that? I've seen the Adafruit libreries, but the Arduino Mega is not included in them. If there is no library, i will have to create it from the scratch.