Sales Reps and Dealers

or search frequently asked questions:

I have an error while trying to create an order from the backend.
I see no dealer info at the order page
Can a customer select the dealer during the registration?
Can I assign a dealer to the selected products?
Can new orders from customers be automatically assigned to either a sales rep or a dealer?
What is the difference between a Sales Rep and a Dealer?
Can customers choose dealers themselves?
Can this extension calculate commissions paid to dealers?