Fsbuild-2 Flight Planner

I just purchased ISG for installation in my Aerosim B777 jets. There's a nice writeup in the 'Panel Retrofit' section by Chock that I'm planning to use.
There's one thing I don't understand, however. In his writeup, he says, "Don't forget to add all the VNAV and LNAV commands in the ISG config file!"

What exactly does this mean? What are the VNAV and LNAV commands being referred to, where do I find them, and which config file (isg.cfg or aircraft.cfg?) do I add them to?

Yes, I've looked through the various docs that come with ISG but I haven't found anything that explains how to set up the VNAV/LNAV commands.

Thanks, Ernie,
But I only have a new panel.cfg (see post by Chock in Panel Retrofits, subject: Boeing 777 (AeroSim), posted Sun Jun 20, 2010)
Question is: What, if any, commands should be added to the default ISG.cfg (or another cfg file?) in order to use LNAV/VNAV? The statement in the referenced post ("Don't forget to add all the VNAV and LNAV commands in the ISG config file!") is where I'm stuck.
-bill