Most of our products are shipped via UPS or USPS. I have those shipping modules installed and working correctly.

However, we also have a few very large items that require drop-shipping from the distributor with a fixed frieght cost.

First, I have no idea how to set up the large items for a fixed shipping cost.

And second, how can these be combined with normal items in the cart, but be excluded from the UPS/USPS shipping costs?

(I tried searching and came up with nothing that I understand.)