Status 7 error / reverting to stock
Hey everyone! I know that there's been plenty of threads about the Status 7 error, however I have been unable to figure this out. I've been getting that error when trying to flash any of the recent Cyanogenmod nightlies. I read a guide (linked below) that goes through a text edit you can do to remedy the issue, however the lines of code are not the same on my AT&T S3 - I've been hesitant to delete lines as a result.
Guide: highonandroid.com/android-roms/how-to-fix-status-7-error-with-cwm-recovery-on-rooted-android/ (spaces due to link-posting restriction)
What I see in my file from the zip: i.imgur.com/TguqYld.jpg (spaces due to link-posting restriction)
I saw another method that required flashing firmware with Odin, however I do not have a data cable to connect to my PC (been using wall/car chargers). There's a mobile app version of Odin but I am not sure if it can be trusted. Feedback regarding the Odin app would be appreciated as well!
I want to either flash a newer CM nightly, or revert back to the AT&T/Samsung stock ROM to prepare for sale (getting a new phone in a few weeks). I have been using ROM Manager (premium) and have been downloading the nightliest right from the app. I know you have to go digging online to find the stock AT&T/Samsung ROM, but can ROM Manager install it if I solve this Status 7 issue?