The process is fully automatic. If you use eCheck via PayPal instead of credit card, it will take several days for PayPal to clear the transaction. I think it's 5-7 days, but I can't remember for sure. Once they clear it, it automatically notifies my software, which hooks you up automatically. I never have to touch anything.
If you receive the email from PayPal that your check has cleared and you still aren't Premium, forward your email to admin at saltycajun dot com and I'll manually hook you up.