Smile [Q] Need help making sure

Hi, this is my first time rooting and installing a custom rom onto my phone and I just wanted make sure I didn't forget anything of do anything stupid...
Alright so I have a SG3, the Videotron Variant on 4.3 stock rom
I downloaded the drivers for my phone, am using the USB cable, and have installed Odin on my computer.
I followed this post : http://forum.xda-developers.com/show....php?t=1771687
and I downloaded the "Videotron image"
my following steps would be to

"Extract the root66 tar file from the .7z file you downloaded.
Put phone into download mode [ with phone off, hold vol. down + home + power ], connect to computer and open Odin.
once in odin click the PDA field and select the root66 tar you downloaded.
Leave Auto Reboot and F. Reset Time checked.
click start and
when done let phone reboot."
and third of all, i'd install ClockworkMod recovery then grab Rom Manager from the Play store and in the menu select to install ClockworkMod Recovery and then install a custom rom from there
Am I missing any steps? For example I was reading about the OTA update section and I didn't understand anything...
Thank you!