Originally Posted by s0x247
no need to flash kernel?
I am not sure if you need the kernel, if you feel adventurous you can try, but I would not recommend. You can flash/update the Kernel on a locked bootloader with a ftf, the FTF is signed with Sonys key.
Originally Posted by keenofhiphop
Flash both parts in a row?
This is an FTF. First unpack the FTF with 7zip then flash with flashtool. You will lose root and recovery.
If you don't want to loose root and recovery you have to create a flashable zip out of system.sin/system.ext in the ftf and modify it or flash superuser and/or dual recovery without rebooting the recovery. Then use flashtool and flash everything but system.