Lawson Materials without General Ledger???

Our organization has been moving away from Lawson applications since our acquisition by another company some months ago. We are currently using Lawson for Materials, AP, and General Ledger. Does anyone use Lawson Materials (Req Self Service, ordering via EDI / Fax, and IC) without using the Lawson G/L system? What portions of Lawson are absolutely required for Materials to function including to place orders and match invoices? Has anyone either done this from the start or else moved to that approach? I am hoping for some information quickly as this has become a very hot topic. Thanks.