Changing Arduino Code

i do have an arduino code that can be found in the following link [login to view URL] this code is turning an arduino mega to a usb joystick device with 256 input (192 buttons or switches and 32 encoder ) i already test this code and its already working for me , when you plug in the board after you did all the process it show 2 controller under 1 joystick (128 input per 1 controller ) and i want to change the code to show exactly like it now but 6 joystick with 32 buttons and 2 joystick with 16 encoders (total of 8 joysticks) , it is working as metrix 16 and i like to keep it like that