Default [Q] [MF3] [AT&T] Soft-Brick Help?

Hey Everyone! Okay so here's what I got, I (very stupidly) Rooted my AT&T (I337) Galaxy S 4. Now that I was all fine until I used a flashing script (AS we have no custom recovery) to flash a "working" Google Wallet package. After I rebooted I would get "NCF Service as stopped responding". I managed to install SafeStrap but I couldn't seem to get anything there. SO I thought "Well let me just reflash to stock" so I tried KIES but KIES detects the latest firmware to be 4.2.2, AS we know it's not, and Samsung made MF3 rather impossible to downgrade. So I got the MF3 files used at BestBuy from here [http://forum.xda-developers.com/show...php?t=2502003]. So I put my phone into Download Mode, Open up ODIN and select the platform software in the PDA section and click start. Odin will start flashing and it goes almost all the way through but at the end I get the error FAIL! (Auth). I shall post the code below:

<ID:0/007> Added!!
<ID:0/007> Odin v.3 engine (ID:7)..
<ID:0/007> File analysis..
<ID:0/007> SetupConnection..
<ID:0/007> Initialzation..
<ID:0/007> Get PIT for mapping..
<ID:0/007> Firmware update start..
<ID:0/007> boot.img
<ID:0/007> NAND Write Start!!
<ID:0/007> recovery.img
<ID:0/007> persdata.img.ext4
<ID:0/007> system.img.ext4
<ID:0/007> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)

Any help? :/