How to read IDOC in flafile structure into SAP to create PO

HI,

We have a requirement like, we will be provided with IDOC PO flatfile structures(Exactly same as IDOC,but in Dlafile format) .

We have to read those flafiles and create POs in our SAP system.

how can we do that?what are the necessary configuration required?

please explian the different steps involved.

thank you in advance.

...Sri