RST: The reset pin. This must be hold low for some time during power up. This could be done by some external logic, but it could be controlled by the Arduino also.
D/C: This is the Data / Command selection line, also known as A0 address line. Please do not confuse this with the Slave Select signal
SCE: The enable line, which is the one which should be connected to the Slave Select pin.
I am currently working on a new graphics library, which also supports your display. You could download u8glib from here: http://code.google.com/p/u8glib/
Unzip the latest beta into the libraries folder and (re)start the Arduino IDE. You should be able to see the examples.
In the examples, uncomment the following line:
U8GLIB_PCD8544 u8g(13, 11, 10, 9, 8 ); // SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9, Reset = 8
This constructor will setup software SPI, so you could connect your display to any available pins. Just provide your pin numbers to the constructor. The pin numbers need to be in the following order:
U8GLIB_PCD8544(sclk, dn, sce, d_c , rst)
where sclk, dn, sce, d_c , rst must be replaced by the actual pin numbers.