You could try doing it under DOS?
WIN 98 utilised DOS for many things.
It has been so long since I used it, but I am sure if you are patient someone will be able to give you the right Command to use. If you have a Windows 98 Start Up Disk, run that and look in the Help Files in it, it will give you the correct Command to use. If you have no Start Up Disk you can get one here, just download it onto a Floppy Disk, shut down and insert the disk and start up again.http://www.bootdisk.com/bootdisk.htm