Apply credit memos to only matched AP invoices while issuing payments using PPR

We have a specific requirement w.r.t credit memos and standard invoices.
Steps:
1)Create a standard invoice by matching to PO(i.e. Enter PO number in Identifying PO at invoice header level)
While selecting specific PO line just change the Unit price so that holds are placed.Make sure Price Hold was kept on the std invoice
Also lets say we have Qty hold on standard invoice.
2)Create Credit memo by doing a price correction(Lines: Correct to Matched invoices)
Validate Credit Memo invoice. When we validate standard invoice Price holds on std invoice would also be released.