MarketPress Plugin support

I am just now joining the wpmudev community. Looking forward on what you have for products and offer for support. Let me know if this is not correct.

What I have is a wordpress website using the MarketPress Plugin for ecommerce. The original person that implemented this has recently passed so I have picked up the project for the client.

I have the MarketPress Plugin activated but I need to have the UPS shipping calculations included. This is where I am at and needing support. I already have a UPS account, id, and access key from them to access the UPS test server.
I have listed the links to the site. First link is to the live site with the Product Listings Only and second link is to the test site with product listing to no.

Any assistance would be greatly appreciated. Normand