I have followed this site to build a base .WIM file. http://www.gerryhampsoncm.blogspot.ie/2014/03/create-customised-reference-image-with.html
It all worked fine. But I want to install all Windows Updates into my base.wim file. My problem is the OS is part of a WORKGROUP and as a result I have no connectivity to the internet. So how so you inject the Microsoft updates?