First - I would like to cover how to do comments when editing the CPAO templates. At the top of the Content.xml file there are some comments:
<!-- Copyright (c) 2007, Microsoft Corporation. All rights reserved. -->
<!-- Standard Month 01 -->
Comments start with: <!--
Comments end with: -->
Comments are ignored by the program. So you can comment out a line a replace it with something you want to try, and if it doesn't work, then you can put the original back in place, etc. You can also use the comments to mark changes you have made in the templates so you can easily find them later.