Hi,
1. You can remove the views login_address_ from the "checkout workflow" option of the configuration. That way, when the user clicks on next, on the checkout, it goes straight to PayPal.
2. If you want the address, you need to keep the "checkout workflow" but change the "registration" option to "no registration" (commercial editions only). That way, only the email and address information will be asked on the checkout and no account will be created for the user. You can use the credit card payment plugin to collect the user's credit card in order to process it manually on your end.