Free goods and create related PO

Hello,

Customer wants to create PO's from sales orders to have correct cost in accounting an match vouchers againts.

So is following possible.

1. creating a sales order with an advanced pricing schedule and selling item which has free good (e.g. service cost) attached

2. free good is added to sales detail file with a line type which generates a purchase order

Q: Is it possible for the free good line to have a default supplier and a default unit cost applied when the free good line is applied.

Thx for your reply.

Henry