Default Help! Unpack boot.img-kernel.img to get config file!

I know I post my questions and nobody never answer but I'll post anyway

I finally Unpack the boot.img of my MTK65 using mtk-tools by bruno martins
but it only unpack the boot.img-ramdisk (and it doesnt have the config file)

so I tried to unpack the boot.img-kernel.img but i cant open the file makes an error and tried to unzip gives an
"not gz format"

I need to reach the config file! I'm still researching, do i need to read more? please tell me what! i dont find the answer
and still working on it.
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