Robo RIO hardware layout?

Hi, I am a Mentor for a high school robotics team, and I'm trying to see if Fritzing would be suitable for documenting our wiring between the robot controller (RoboRIO), motor speed controllers, pneumatic controllers, etc. My question is this: most of the 'pre-loaded components' are off-the-shelf items, but i don't find RoboRIO there, for example. Is there a way to 'draw my own' simple sketch of the RoboRIO hardware, with terminations, etc. and then use that in a wiring diagram? Same is true of other components: can I sketch them, add terminations, etc., then include them in the wiring diagram?
Ben