We are using the PO module quite actively, and it is working nicely.

We would like to start using the Requisitions feature, but not exactly what it may have been designed for.
Instead, we would like to create an RFQ (Request for Quote) using the PO Requisitions and send the document to perhaps 2 or 3 of our suppliers.
Once we decide to accept one of the bids, we will Approve the Requisition and create a PO, without having to re-enter the details, except to update the costs.

When we create the Requisition, we have no need to enter a Vendor #, as we do not know who might be awarded the PO. However, it seems that the PO module will not allow us to keep the Vendor # blank.
We can probably get around this by creating and using a Regular or Sundry Vendor # “REQ” (or something like this).

Here is our problem & my question:
Once we are ready to accept the Requisition, we want to change the Vendor # to the actual Vendor that we will be issuing the PO to. But the PO module does not seem to allow us to do this automatically.
Even when we change the Vendor # on the Header, it does not update any of the detail lines.
Our problem is that all the details lines will still have the Requisition issued to #REQ.
The whole idea here is to save time and not have to update each detail line in order to change the Vendor #.

Any solutions or ideas?