Hey, i am customizing a tiny board with the at90usb646/1286，and when i came to burn bootloader to the blank chip with a isp programer , i don't know how to set the correct fuse . i saw these page , and it linked to the github where the bootloader.hex is , but nothing about the fuse setting was mentioned in the page and the github repositories.
Can any one give me some idea to set the fuse , if i want burn a Arduino-modified booloader.