This is the section I was talking about in boards.txt
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atmega168.name=Arduino NG or older w/ ATmega168
atmega168.upload.protocol=arduino
atmega168.upload.maximum_size=14336
atmega168.upload.speed=19200
atmega168.bootloader.low_fuses=0xff
atmega168.bootloader.high_fuses=0xdd
atmega168.bootloader.extended_fuses=0x00
atmega168.bootloader.path=atmega
atmega168.bootloader.file=ATmegaBOOT_168_ng.hex
atmega168.bootloader.unlock_bits=0x3F
atmega168.bootloader.lock_bits=0x0F
atmega168.build.mcu=atmega168
atmega168.build.f_cpu=16000000L
atmega168.build.core=arduino
atmega168.build.variant=standard