Originally Posted by SonyFan23
So here we introduce: "dd if = <filename> of = <Where is it>"
Will look like?
dd if=/mnt/sdcard/boot.img of=/dev/block/mmcblkNNN
True or false?
Almost correct, of=/dev/block/mmcblkNNNpNNN.
If you don't know which it is you can find which partition is the kernel written to with package_extract_file or write_raw in any CWM flashable kernel for your phone.
You better make sure fastboot is working for you before you try it or you may not be able to recover if it is not safe to do and the phone reboot before it finish.