Change Name of the ComPort Arduino Uno

Hi folks,
i would change the name of Comport of Arduino Uno when connected to PC by USB port
instead of "Arduino Uno (COM1)" -> "MyName (COM1)"

I found on web, i have to rebuid and reprogram the Atmega16u2 present on Uno Board.
in the Arduino directory i found ...\atmegaxxu2 where is placed hex and source code, but when i try to make how said in "atmegaxxu2\arduino-usbserial\readme.txt" it say

make: *** No rule to make target `../../LUFA/makefile'. Stop.

So i need LUFA files, but where are these?

do you have any suggestions?