Technically, it is all over the place. Much of it self evident. Such as SINGLPLAYERCAMPAIGN.xml
or SCRIPTS/STORY/EP_01_M3REBEL.xml and txt files.
It is not in one spot. Look at the EAW_XML file for download here in the thread "Expanded XML Ready to Go" to spot them easily. Just use a text editor to change something, event, whatever for XML (it has a readme to explain more). The SCRIPT and LUA files have not been expanded yet.
I took a weekend off to fix my truck starter which conviently went over the weekend, here is was -8 below zero Fahrenheit with a 15 MPH wind. Talk about a cold tard.