Hm, so far its the only recovery for locked bootloader on XPERIA Z.
---------- Post added at 10:50 ---------- Previous post was at 10:47 ----------
You are a real massacre, really. Did you bother to read instructions?
Byeselinux is a script that disables enforcing Selinux, hence makes XZDualRecovery 2.8.3 working. You run it from Windows/Linux while connected to mobile over USB. You need to be already rooted.
SGP621-RICDefeat.zip is NOT flashable. You unzip it in PC, and like byeselinux, you run it while connected to your mobile. It disables RIC, hence enabling remounting filesystem in writable mode.
You need to uninstall and reinstall your file manager (Root explorer, ES File Explorer) after installing SGP621-RICDefeat.zip
Guys, I really wonder how many times I and others have to write it down.