How is a Pseudo Non-Stocking Type code setup?

The A9.2 Equipment/Plant Maintenace Guide discusses using a Pseudo Non-Stock Item in two places in the Inventory Concepts and Setup Section. And in one of those places even refers to See Also "Setting Up Order Line Types in the Procurement Guide". Then a look in the Procurement Guide does not explain setting up a Pseudo Non-Stock Item or Line Type. How would a Pseudo Non-Stock Item be setup? I have to assume it would be some combination of it's Stocking Type and the Order Line Type Interface setup. We will have Maintenance Parts that we will want to bring in to Inventory and not expensed until used. Then we will have parts that we will want to not stock in Inventory but "do not need to keep a physical on-hand quantity... However, you want to maintain inventory records to assist