These are 720k disk images.  You need Teledisk to recreate the disks.
Teledisk can be found at:

    ftp://tvdog.shacknet.nu/tandy1000/system/teled212.zip

The disks should be labelled:

Tldisk1.td0      MS-DOS/GW-Basic and Supplemental Programs
Tldisk2.td0      DeskMate 3.02 disk 1
Tldisk3.td0      DeskMate 3.02 disk 2


The DOS disk contains Tandy DOS 3.3, which is usable on other 1000-
series models (it will not run on a non-Tandy machine).  DeskMate
3.02 on these disks requires a 1000TL ROM.
