How To Accomplish Manual Update In Bd2012 Av?

We have some computers that are on the internet and some that are not ever connected to the internet, although they do get exposed to possible malware via users' CDs thumbdrives and such, so they need AV as well.

How can I update BitDefender 2012 AV manually? On older versions, I was able to take a downloaded cumulative.zip to such computers and unzip them in the appropriate spot and reboot. Firstly, doesn't seem like cumulative.zip is updated consistently anymore and secondly its not recommended on bitdefender.com for any recent versions of BD. Looks like weekly.exe is available, but can't be run unattended (requires human intervention to click 'agree' or something like that) and I'd prefer to keep this as part of my automation ******.

Why would a useful feature like this be removed?

Thanks

-bC