RV_INVOICE_CREATE - Invoice with your own number?

Hi Everyone,

I am using FM RV_INVOICE_CREATE, to create an invoice with reference to a delivery (passed the delivery to the KOMFK structure).

However, I am having trouble with the following:

1) How do you pass the number of the invoice you want created?

With Sales Order FM's, I knew how to do this.

However, with this FM, SAP generates it's own invoice number.

Is there anyway to pass it? The invoice needs to be  custom number we are passing through.

2) Pricing Conditions - How do you pass them, meaning to which structures?

Will these overwrite the conditions passed from the Sales Order?

Thanks!