MDG Design Question

Hello Experts,

I have few questions on configuring standard MDG

1. Should I copy the standard data model to a zmodel and then start the configurations.In that scenario should I also copy the standard UI's to a Z UI component.What are the steps involved , any blogs or guides on this.

2. When we implement vendors and customers in MDG , is it possible to do without the creation of Business Partner BP.

Thanks.