Enhancement Request: Prevent accounting of invoices until they get workflow approved.

We have plenty of unapproved invoices that get posted through create accounting since their distributions are already validated. We want to prevent accounting of invoices until they get workflow approved. We are using invoice work flow for approval process. We want to prevent accounting of invoices until they get workflow approved. If we use Option "Require Accounting Before Approval" , this option when checked doesnot allow us to even initiate the invoice for approval. If we check this option then we can initiate only after accounting has happened. This is just the reverse of what we want....