Firmware

Arduino IDE

Open up Arduino IDE. If not using OSE Linux, download Arduino IDE v1.6.8 (tested, not new version. Do not use the newest versions. which have not been tested)
Upload firmware from section above - after connecting USB B Connector to RAMPS controller
Firmware includes geometrical properties of the 3D printer - such as settings for the print bed size, location of probe, location of endstops, etc.
Select Arduino Mega from Tools/Board. Select appropriate USB port from Tools/Port.
After software is done uploading, quit out of Arduino IDE and open up Cura

Open up Lulzbot Cura. If not using OSE Linux, download Lulzbot Cura.
Cura already has the initialization profile on OSE Linux. If you are running it on a non-OSE Linux operating system, download D3D_Lulzbot_Cura#Configuration_Profile_-_Files

To select bed size and motion area - line number _______
To select location of sensor - line number ______ -
To select probing type - select 3-point in line number __________
To select different thermistors - line number __________ - standard thermistors are 100k

Arduino IDE - If you get a COM1 error in the Arduino monotor when trying to upload to the Arduino microcontroller - go to Tools/Port and select the correst USB port.