On Prestashop Store, create 2 invoices serial secuences separatelly, one for persons and other for profesional customers

On Prestashop Store, for orders imported by an Amazon module, i need a modification that permits me to choose between 2 invoices serial secuences separatelly: one for persons (for example IN_PER_0001) and other for profesional customers (for example IN_PRO_0001). By default, these orders are imported with "Payment Accepted" status, and then, an invoice was generated automatically. But I preffer that it will import with another status (pending) and then, i manually put payment accepted and in this moment, Prestashop ask me what serial choose, and after it, generate the invoice.