TOPIC: Credit card payment through the backend?

Is there a way to submit a payment from the backend rather than from the front end? From what I understand, for a pay later registration, currently the administrator would need to process a credit card payment directly on the Authorize.net site, than go to the backend and mark the registrant as paid. This makes it fairly cumbersome when you have to do this several times a day. If the administrator were to submit the payment through the DTRegister component in the backend, this would automatically register the payment at the same time.

Is there an alternate solution?