What the customer is looking for is to have their receiving clerk print one label at a time as ROG is processed on a purchase order. (I've suggested the typical workarounds which could include a Crystal Report/Label). They're looking for an automated system that spits out labels as PO Receipt of Goods per invoice happens.
As Sage does it now --- whether before or after an update -- all the inventory labels come out in one batch (have to check if they're sorted by PO but I don't think so). Customer's argument is that their receiving clerk could screw up and put the wrong label on the wrong item if they have a big batch in front of them.