Mass PO Date Changes?

Has anyone created a modification for updating many PO Promised Delivery dates at once? We get very large order acknowledgements and would like to use some level of automation to get updated delivery dates into F4311. Any ideas?

This could be for a single PO# or multiple PO#s.

A potential issue - we may need to split lines on occasion. For example, order quantity = 100, 50 have one delivery date, the other 50 have a separate date. Unsure how this would be applied in the mod.

Thank you!