You can register on-line with a credit card, by filling out a form on the
secure (most browsers support this) or normal server
Or you may use the Register program to create a form to email, fax or mail with your payment. Register comes with Startup Doubler, Smart Scroll, Clean-Install Assistant and Custom Menus, but you can also download it from here. Registrations are handled by the Kagi payment processing service.
Please see http://www.marcmoini.com (or http://www.kagi.com/authors/marc/) for the latest on Startup Doubler!