How do I set Marketpress up for Dropship Products?

I don't have an option to check Marketpress on this form, sorry.

I just viewed the prepared walkthrough of Marketpress and am very impressed. But, there isn't anything in it that discusses using Marketpress for selling products that are provided by a dropship wholesaler. I have a membership with WorldwideBrands and I'm planning on selling products from their supplier network on my pages. What do I need to do to configure Marketpress to accomodate that?