BURG is not supported by EasyBCD at this time. GRUB, GRUB2, FreeBSD are all supported but nothing more when it comes to Linux Distros if I remember correctly.
EasyBCD creates these when you add the entry. Since it isn't GRUB or GRUB2, you will have to go to Chakra's website and find out how they allow it. Till we can get support for BURG there is not going to be anything we can do to help.