Yes that post is our How to: Root the Kindle Fire HD and 2:
The description on how to move otacerts.zip is posted at the bottom of our post.
The reason we built this script is due to the number of backdoor services running on
the Kindle Fire, there are quite a few. Most send your buying habits to Amazon, we disable
this communication path. The other benefit by running this script is it helps to increase
your battery run time since it disables unnecessary services. I can completely understand
why you do not want to Root the Kindle but on the other hand you are losing out on
many benefits. This is why we designed the Noob Series, to allow anyone to complete the
tasks in the tutorials.