Your phone is already rooted, right? If so, then download the file in the first post. If you downloaded it using your phone, it's easier. Make sure it's on your sdcard for simplicity (move it if it's not). Then, I recommend downloading Es file explorer because it can unzip the file for you (unless, of course you already have an app that'll do so). The exact steps from that point kind of depends on what app you use at that point, but basically you (1) open up whatever app you have that'll zip/unzip (2) navigate to the folder the file got downloaded to (probably called downloads) (3) tap or long press (depends) on the file you downloaded (4) unzip the file to the folder that msmsoft said (clockworkmod/backups)
If you downloaded it using your computer then, you'll essentially have to do the same sort of thing. Make sure you have a program that can zip/unzip files. If you don't have one, download one like 7-zip. Navigate to the folder you downloaded it to (again probably downloads). I would then unzip it on the computer then plug the phone into the computer, navigate to the folder msmsoft mentioned, and drag & drop the file into that folder.
If your phone isn't rooted yet...then this is the wrong thread, lol. There's one for this phone that specifically has root in the name.
Post again if you need more instructions. [emoji4]