Unhappy [q] status 6 error

Hey y'all,

I'm STUCK on AT&T's rooted Samsung Galaxy S III 4.1.1 (I747UCDLK3). Since i can't find any 4.1.2 MD5 file and the OTA doesn't seem to download - I'm currently out of the US - I decided to use the update.zip file uploaded here.

First, i had the status 7 issue and then i selected the toggle verification stuff and that cleared by just as soon as i select "YES" on the "DO U WANT TO INSTALL THIS UNTRUSTED FILE" or something like that, i get the STATUS 6 error and the installation is aborted.

PLEASE HELP! I REALLY NEED TO UPGRADE THIS PHONE FROM 4.1.1 to 4.1.2 and ULTIMATELY TO 4.3.