Ok,
Regarding the no registration question I think that you'll find your answer
there
:
If you want to have a checkout without registration but with address, you will have to have both "login" and "address" views in the checkout workflow. Then, in the Checkout tab of the configuration, you can change the option "registration" to "no registration" in order to remove the creation of a user account. Also, you can turn off the "login" option there to remove the login area of the checkout.
That way, you will still have the address form but no user account would be created.
That "Registration" option is only available in our commercial editions.