Simple Sketch Sparkfun CAN shield & Arduino MEDA ADK

Hi guys, I am working on the CANbus shield of sparkfun & Arduino Mega ADK. I tried a lot of sketch and changed the SPI pins.

There is someone that can post a simple sketch in order to read all the data coming from the bus and write on it custom messages.

Thank you very much!!!!!

no one has a simple sketch to start?