How to install the driver
As for people whose mainboard type is Ramps1.4+Mega2560 (or R3), you have to Download "Arduino" first.
http://arduino.googlecode.com/files/ard ... indows.zip
After downloading, unzip the file.
Then you can intall the driver for Arduino Mega 2560(R3). The driver is at: arduino-1.0.1-windows\arduino-1.0.1\drivers
you can refer to this page to install the driver:
http://www.geeetech.com/wiki/index.php/ ... he_drivers