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:

Disk1.td0        MS-DOS/GW-Basic and Supplemental Programs (ver 3.3)
Disk2.td0        DeskMate 3.03 disk 1 - Address Book, Hangman, Text
Disk3.td0        DeskMate 3.03 disk 2 - Calendar, Filer, Form Setup,
                   Worksheet
Disk4.td0        DeskMate 3.03 disk 3 - Draw, Music, PC-Link, Sound,
                   Telecom

DeskMate 3.03 on these disks requires a 1000TL/2 ROM.
