An apparatus for and method of efficiently adding software modules to large scale data processing systems. The customer is supplied all potentially applicable software modules upon system installation. However, each optional software module requires a key for enabling user access. Whenever the user needs an additional key on an emergency basis, it is requested via the Internet. Upon receipt of the request, the software supplier verifies entitlement of the requester to the key including licensing, payment, and configuration concerns. The key is supplied over the Internet upon verification of entitlement.