I'm running 1.3.8a and have a need to show two different pricings for the products, based on where the customer lives.

I think I'm on the right track with this mod but not sure where to start.

I tried installing it last nite and got no where and eneded up restoring the backup to get back to where I started.

The mod with the 4 groups will do what I want because it allowes me to configure each customer for a specific group.

What is the best way to install the mod?
What files do I need to download?