Root Success .. thanks .. Alltel (CDMA) Samsung Galaxy S3 SCH-R530X , running stock 4.3 JB .. Unfortunately no custom rom for my model are available .. I guess I could try a few things, but according to the method I used from the post , not sure if it's possible anyways .. regardless , I rooted for tethering purposes, and I have achieved my goal (I have unlimited Data, and I would have to pay $$ extra per month to activate tether features on my phone) .. Maybe one day i'll look into custom roms , altho' I would love to have my own personal BOOT ANIMATIONS, but for now, i'm cool with stock ..
NOTE : I used SafeRoot + Disable_Knox zip and the newest Samsung USB Drivers for Mobile phones .. I DID NOT USE KIES