Ryan,
I want to come back to this thread. Within the 6.5 rerlease of CPPM we have added a lot of API orchestration. This includes a WHOLE section on onboarding. You could use the new API's to automate the creation via script of certs etc.
To get started take alook at a 6.5 node under htis URL https://your_cppm_ip@/api-docs
You'll need to create created an API Client. The API Client you create should be of type 'client_credentials' (to start with) and 'Super Administrator' as the Operator Profile. You can lock this down later.
HTH