Quite simple:
download all three files to the same location, open the first one (named .001) with 7zip and click "extract" - as a result you should have a single large .ftf file which is the flashable firmware image.
Quite simple:
some firmware that i can use to upgrade to 4.4 without losing locked bootloader? thanks .
can I root without loosing the Bravia and all the sony stuff? I heard about the TA backup but I don't know how to install it? after the root? and now can I root your version without loosing the waranty??