Questions & Answers:
Q: What is this?
A: Just original Lenovo firmware for Vibe Z [k910 kiton] BUT beta version used before common releases
Q: What is the differencies between this and the ones from Lenovo?
A: All roms will be available after i made a few changes. They're all be Zipalign & De-odexed
Q: Is this rooted?
A: No, like i've wrote before it's just like stock, but beta version. Either way, if you use TWRP or Philz Recovery you might root right before you reboot.
Q: How can i install this?
A: Well…if you don't even known the basic it's time to SEARCH, learn, read and don't ask silly questions