Hello tenacious
Just go to this page which is regarding the SCP certification program: Network Certification | SolarWinds Certified Professional - SolarWinds, and read through the information about the exam and process. Once you are ready to register, there are a number of hyperlinks or buttons entitled "Register For The Exam" on every page of this SCP information site. All will pop up a registration form that looks like this:
Fill in your First Name, Last Name and email address, then click the blue "Submit" button. Once we receive that registration request, someone will process and send out an email with instructions on next steps.
That is all you have to do to register. We hope that helps!