Create boot floppies

you will have to say the type of tape device you are using.
If its a USB connetion then I dont think there is a way of getting it to work in DOS.
If its a IDE then all you need is the dos drivers for that device. Go to the companys web site and download the driver for DOS and install it, or try http://www.driversguide.com.
If its scsi then you will need the drivers for the scsi card and then the drivers for the tape drive. Follow above instructions.

I am going to make an assumption that your system crashed and you are trying to reload your OS from tape. Most advanced tape drives need to operate inside the higher level OS's (NT, Win9x) to fully restore the original versions of the OS and programs, unless the back up software allows a boot disk restore. You may have to re-install NT, then install your backup software and use it to restore your original configuration. In general, NT does not restore from tape in DOS anyway if you have NTFS drives, since only NT can see them.
Hope this helps.

If DOS drivers are available, installing them in the config.sys/autoexec.bat files on a DOS boot disk will load the tape drive.

If you have to load drivers from a running NT install, you can do the FDISK/Reformat and install NT to an alternate directory ( like c:\restorent ), and install the tape device from this install. Then access the device, restore the original NT into c:\winnt, edit the boot.ini to point to the c:\winnt folder and reboot. Once you've successfully rebooted into your restored NT install , you can delete the "restorent" directory and subdirectories to reclaim the disk space.