$0 AP invoices

We prepay many of our vendors, so we don't get invoices from them...at least not invoices that we enter into Lawson.
Back in Lawson 7, we could enter $0 AP invoices and match them to the PO receipt.
As of Lawson 8, we could no longer enter $0 AP invoices into Lawson...so we would create $.01 AP invoices.
This just floods our AP with $.01 invoices.
MA80 and MA180 just don't seem to be the type of solution that our accounting group is looking for.
Does anyone else have a solution they are willing to share.