Production Order Confirmation- User Exit

Hi guys,

I am working on File to IDOC scenario interface in SAP XI/PI.

Here before posting a confirmation IDOC into SAP.. validations or data checks required for Order Number ,Order status, size grid, std text key and work centre.

and this can be achieved using some USEREXIT..I have found the USEREXIT as PPCO0001 with the help of an ABAPer

Could someone help me whether it is the right one if not what could be the other one and the steps involved in implementing it

Thanks

Sahil