In a pinch, try these attached files (zipped). It is a DOS program called "HD Copy" that duplicates floppy disks track for track. It doesn't care about what format the disk has or hasn't. I have been successfully using this program to copy our VTS Install disks for the last two years.
Note that if you create a new copy of VTS install disks, that set of disks requires a serial number. you can obtain a serial number from Barney Lucas at Global McKinney. The old set of install disks should be sent to Global McKinney for retirement. Every set of VTS install disks (or GEMS CD) is a license agreements. Every copy that a customer has, is a separate license agreement that generates billing for multiple software maintenance fees, even if they are only using one.
If you are on a customer site or dealer site and discover multiple install disk sets or CD's, please send them back to Global McKinney, so we can remove that serial number from existence and maintain one serial number per customer site.