Interfacing with a 16 Mbit SPI Serial Flash

Hi together,

i've got the following 16 Mbit SPI Serial Flash: and i want to connect it to my Seeeduino Mega-Board. I've got the following driver: but i don't know how to use it. Because usually with the arduino, the pins are defined as constant ints, bur i think in this driver, the "CE", "SCK" etc. pins should be defined as "DDRAx" or somethin like that.

Could anyone please help me with that problem?

Thank you, Max