Try installing the OS without the bootdisk.
You can install WIN2K without using the bootdisk if your system support boot-up from CD-ROM Drive. As your system is a PIII, this option is generally available.
When you power-up your system, thereis an option to go to the CMOS/BIOS setup by entering the "F2" or "DEL" key (varied with systems). In the menu, look for boot options. You can configure your system to first boot from "C" drive, "A" drive or "CD-ROM" drive. As for this case, you would want to select boot from your "CD-ROM" drive. (at this stage, you would want to insert the WIN2K CD in the CD-ROM DRIVE) Be sure you save the setting when exiting the CMOS/BIOS setup menu. The system will re-boot and initialize the new setting. If every goes well, you will see the Windows Setup Menu. Follow and choose the options available from the menu.
Good Luck
Regards
Soekratis