Okay, I read that documentation but I was still confused on how it applies to me. Maybe I should just tell you what I desire. I want to be able to have subscriptions to products and I want to be able to have my customers pay in installments. For instance, for a lifetime subscription of $450, I want them to be able to pay in 3 installment payments, billed on a monthly basis. After they have paid the balance in full, then they continue with the lifetime subscription. It is unclear how to do this with your instructions. I do not want them to pay 3 payments of $450, I want them to make three $150 payments. I also want the subscription to continue after all the installments are paid. Do you have any suggestions on how I can do this? Thanks!