The present invention preferably automates mainframe computer operating system upgrades by automatically installing a base operating system on the mainframe system, performing information-gathering of an existing mainframe computer system, using the information to recreate the environment settings of the existing system, and providing a series of directives typically required of a skilled mainframe computer systems programmer for an IPL. By preparing a mainframe computer system to automatically perform an IPL, and, thereafter, automating a series of configuration process to install optional products, the present invention decreases the amount of time and operator skill-level requirements for prior art mainframe computer operating system upgrades.