update on a stand alon pc

Hello,
I have a few computers without internet connection that I want to update.
I thought that a simple solution can be to change the update url of the avast in each pc to the url of a main pc and then d/l each update manualy and put it on the mail pc.

Is such a thing possible?

thanks,
Roy.

download and put on a USB stick…then install

http://www.avast.com/download-update