One Provider Contract forMultiple Provider order Lines

HI Experts,

We are running on SAP CRM EHP 3 and SP05, Need to  create one single Provider Contract for More than one Provider Order Lines which are entered independently and not as Sub items.

At the End when we save and submit the Provider Order I should be able to see one single Provider Contract for all the Provider Order Line items(with item cat PRRP)

Please help to understand how this can be achieved?