Marketpress Global Cart install on a multisite network

In this project it requires one global cart. One admin to control the look and feel of the store and payment types etc.

I installed this plugin and Network Activated it and see store settings in each of the multisites.

I am logged on as the super admin in my testing.

1. Is Network activated the correct way to install MArketpress using Global Cart? Or should it be activated in root site?

2. Should I be able to see settings in subsites? I thought maybe it would just be products and product options that a subsite could see.

It is not clear in Marketpress useage or details info on what is correct way of install.