Marketpress

Hello, I am new to your system and am having trouble finding guides. For example, on the MarketPress plugin, I see the installation instructions, good, so I installed and activated the plugin, but now how do I set up the actual checkout pages etc? I drag and drop the shopping cart widget in to a sidebar? Then how does it know to create check out pages etc? Do I have to do these? Is there a step by step guide? The MarketPress tab in the admin area only shows how to get an API, app approved from Paypal. I need to set up a test checkout but can't find instructions in your manuals, forum or a txt file on know how to do this. Am I missing an obvious manual?

Thanks

WordPress Multisite
MarketPress
Product theme