Inventory cube 0CP_IC_C1 enhancement

Hi,

I want to enhance the Inventory cube 0CP_IC_C1 inorder to get the Purchasing details in to the inventory cube. Because i need the PO details pertaining to the particular Good Receipt values.

Is there any way to get the PO details based on the GR values or can i go ahead and enhance the Inventory cube to get the PO Details.

Please advise.

Thanks,

Sheshu