Arduino Due Opentracker (Native USB Port) is not getting added in board list

Dear, I have TIGAL opentracker V2 board.I ahve installed Arduino1.5.7 version it get installed, But Arduino Due Opentracker (Native USB Port) is not showing in board list.

Pls. Suggest how to add it.

Also, I am gone through "Adding opentracker 2 as board to arduino IDE. Unable to get "Arduino startup files" and "ArduinoIDE Integration" file and folder.

Suggest from where should i download these folder.