[Q] Help Kernel.ELF?

Hello, i need help about a kernel.elf



i want to modifiy picture of a existing kernel but i can't unpack it with tutorials founded :'(



When i unpack it with Flashtool, i just have 4 Files : Kernel.elf - Kernel.elf.2 - Kernel.elf.bootcmd - Kernel.elf.Image - Kernel.rpm.bin



Please what i'm supposed to do with that for change picture?



Thanks for all dev's works ;D



Edit : i'm on Ubuntu and i've Windows 7 x64

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