These are 360k 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:

Msdos.td0      MS-DOS/GW-Basic 02.11.24
Pddisk1.td0    Personal DeskMate 01.01.00 disk 1
Pddisk2.td0    Personal DeskMate 01.01.00 disk 2
