well, im in india, and here, thankfully, carriers don't bother with locking bootloader and stuff.
And thanks to fatguy666. booting into fastboot mode was genius.
i booted into it and flashed kernel using flashtool.
and then phone went into recovery using normal given methods.
everything is done and dusted now. my xperia z2 is rooted! yay!
i love XDA. and thanks to fatguy