Need help with Firmware side of Extruder Fan mod

Hi firmware gurus,

I need some help with finishing the extruder fan mod.
I have  a Solidoodle 3 with this board: http://www.soliforum.com/post/28760/#p28760
I had a friend solder up the mosfet and headers into the "EXP1" spot on the right side (not "fan" at the top) as described here: http://solidoodletips.wordpress.com/201 … ruder-fan/
I began following these instructions to enable the fan in my firmware and have completed up to step 13: http://www.soliforum.com/post/43170/#p43170
Now, when I went to enable the fan as mentioned here: ( http://solidoodletips.wordpress.com/201 … ruder-fan/ ) I found don't have a "Pins.h" tab on my arduino list as mentioned. I do have "SD2 pin map.h".
Under "Configuration_adv.h" tab I do have this :

#define EXTRUDER_0_AUTO_FAN_PIN   -1
#define EXTRUDER_1_AUTO_FAN_PIN   -1
#define EXTRUDER_2_AUTO_FAN_PIN   -1
#define EXTRUDER_AUTO_FAN_TEMPERATURE 50
#define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed

Should  I change "#define EXTRUDER_0_AUTO_FAN_PIN   -1" to "4"?
Am I using the right Firmware version?