[quote name='fourcute;27764]master : can you tell me "how to unpack/pack kernel.img?"i want to mod the kernel.img' date=' thanks [IMG]http://www.slatedroid.com/public/style_emoticons/<#EMO_DIR#>/tongue.gif[/IMG][/QUOTE']I cannot give you exact directions. Hopefully I can give you some ideas that may help.Since the Andriod operating system is based on Linux then it seems likely that the how Linux packs the kernel.img would be the same on Andriod.If that is the case then kernel image would be packed in the zImage or bzImage format. What tools you could use to unpack/pack the kernel in that format, I don't know. But maybe with knowing the possible compresion format used will narrow down search.