Communication with two microcontrollers via SPI

I was checking for SPI libraries and noticed there is one included on Arduino folder. After opening it, I verified its an SPI master library. As I need to communicate between two microcontrollers (ATMEGA2560 and ATMEGA328P) there has to be a master and a slave. So, this library would not allow me to complete fulfill this purpose... Does anyone have managed to make a project like this or have tips/hints?

Many thanks.

It's not hard to do, have a look at Nick's tutorial here


Graynomad, many thanks for your reply!