Downloaded rom zip from sammobile. How to flash in Odin?

I'm planning to take my s5 back to unrooted stock lollipop. I downloaded the rom from sam mobile. But how can I flash this in Odin? Do I unzip it? If so, which parts should I flash in Odin?

Sent from my XT1575 using XDA-Developers mobile app

from xda-developers http://ift.tt/1NXrUsX
via IFTTT