Can you get a hold of a digital camera and take a snapshot of the firewall? I ask because you make it sound like you don't have an EGR on your CA VX, is this true?
Don't plug in the 49 state ECU into the harness just yet. there is a thread on here by Matt or somebody on the pinouts of the O2 for the 49 states model. you'll want to get those wired up first.
I would be more helpful right now, but I'm in the middle of proctoring a state issued test to the kids.
Glad doing business with you to.