Can I accomplish this with shipping config?

see the attached screen shot

I would like to define criteria (weight or subtotal can work)

For the smaller stuff we sell, books and DVDs, let the user choose among USPS, Fedex… But for the more valuable musical instrument that we also sell, we must use FedEx. In the current shopping cart I was using, it shows USPS Express Mail Int’l as an option for the customer to select and I don’t want that. So if I were able to tell the cart to only offer USPS First Class and Express Mail Int’l on orders that weigh say up to 7 lbs, that would solve the issue. Can CS-Cart do this?