The invention is a method and related structure for providing operating system drivers during installation of the operating system, where those operating system drivers are provided by way of a virtual disk drive. Basic input/output system (BIOS) routines are adapted to support showing these operating system drivers as residing on a virtual disk drive within the system. The operating system drivers are stored in the unreserved ROM space of the computer. Further, multiple floppy images are stored in the ROM, and the BIOS is adapted to show only the floppy image appropriate for the operating system to be installed. The virtual drive contents may be those operating system drivers stored in the unreserved ROM, but also may be physically stored in RAM.